Whats the weirdest concert you ever attended?

I have to say this is only bought up by one particular concert I attended in 1970 in Birmingham England.
I went to see a German band called Faust. They had a bit of a reputation for being more weird than most, and that's saying something given other bands around at the time and had an underground following along with Henry Pig and Hatfield and the North.
So.... I was in row two and eagerly waiting for the show to start. The auditorium was completely dark except for the lights on the amps. At each side of the stage there was a big old 36" colour TV set and a pinball machine.

In due course, everyone assumed that the band came on stage as the light on the amps went off in sequence as if someone was walking past them. Then, eventually, odd sounds started emanating from where we assumed the band was. Still no lights. Then the TV's burst into life and were showing a different channel on either side of the stage. Still no sign of the band.
Next a guy walks on stage in just his underpants (1970's Y fronts)and starts playing the pinball machine. Every time he used the flipper the TV channel changed.

This was how the whole one and a half hours were spent until the guy on the pinball either got bored or the band got bored but he just walked off, the music stopped and the lights on the amps flickered again so we assumed that the band had left the stage.

During the course of the "concert", there was all sorts of aromas of illicit substances. To put the icing on the cake, about half way through, a woman in the front row turned round to me and said "would you hold this for me" offering a newly lighted special cigarette. After passing it to me she proceeded to turn back to the front, lean on the stage, have very quick very rough sex doggy fashion with someone I can only assume was her partner and then ask me for her joint back!

My head was really messed up for weeks and I'm still not sure if it was the concert or the side show which was to blame.
well, the 70 ties will never be back....couple of year ago I was at the concert of one of the best conductor and orchestra in the world nowadays and the concert hall was half empty....weird, is'n it?
I envy you to see Faust live.
I mostly attend weird concert so it's fund to list:
1. Art Ensemble of Chicago -- early 90s
2. Larval at NYC Jazz festival at South Street Seaport
3. Nils Petter Molvaer at NYC Coney Island High
4. Gong with Daevid Alen and Steve Hillage at KnittingFactory NYC
5. Acid Mothers Temple japanese noise prog band at King's in Raleigh NC,
6. Death -- neo-punk band at Hopscotch Raleigh festival
7. Pere Ubu -- at King's in Raleigh
8. Few times attended Residents in NYC (they wear eyeballs and play weird tunes with weird videos displayed on whiteboard during their performance)
9. King Crimson ProjeKCts in Irving Plaza NYC
Hollywood Palladium 1972.Headliner Alice Cooper opening acts Commander Cody and Howlin' Wolf.We had driven 100 miles to hear Wolf and the concert was sold out.We had to go around to the backstage entrance and bribe a security guard to get in.We got in,Wolf was great and we left before Alice Cooper got the hangman's noose set up.
David Bowie at Knight Center in Miami. After Stereophonics opened, a stagehand fell from the scaffolding, landed on his head and died on the stage in front of the crowd. Bowie was canceled and we went home saddened.

Genitorturers at the old Cameo Theater on Miami Beach. The most bizarre show I have ever seen. If I described what went on, my post would probably be deleted. Consider the band"s name, but you still wouldn't believe it if I told you.
Maybe the "weirdest" concert I saw was The Yardbirds with Jimmy Page right before he left them to start the Zep. They were playing in this dinky central Florida civic center venue in front of a couple hundred drunks who seemed more interested in partying and raising hell than listening to music. I sat off stage right next to Page and watched him get progressively more pissed off at the proceedings. There only seemed to be a dozen people there who knew who the band was and were paying attention to the music. The band stormed off the stage after an hour in a foul mood but Jimmy did stop to give me a string of cheap love beads. I was only fourteen at the time and couldn't drive. I had to wait for my Dad to come pick me up after the show and while I was waiting outside, I got quasi beaten up by a trio of drunken rednecks.
Jefferson Airplane when they played Dallas in the ‘70s.

The concert was good but what a strange crowd.

I was accustomed to smelling the special cigarettes (which I did not like) but this evening a small brown haired hippy girl kept staring at me as I took photos.

Finally she approached me and said,

“Man, you are really weird”

Then looked at me like I was a ghost. Her eyes were more like a dead persons, a stare without focus and she swayed so much I feared she would fall.

Then her face landed back into the large brown paper bag she was carrying and the next words she spoke were permeated with the stench of airplane glue.

From the look in her eyes and on her face I’m grateful she was not someone I knew. If she’s lucky there are more than two functioning brain cells left in her head after that night.

It was a vary strange time, lots of kids did stuff they probably regret, assuming they are still alive.
I'm a huge Miles Davis fan, but the only time I heard him live was a real disappointment. It was in the 70's during his "Jack Johnson" / "In a Silent Way" days. His side men played for awhile before Miles limped out (his foot was in a caste). Then he proceeds to play with his back to the audience for just about the entire time. Pretty short set too ... very uninspiring. I left thinking "what was wrong with that dude?"
Todd Rundgren and Mojo Nixon tied for the most obscene and off the wall shows I have seen
Nothing really too weird, but I did see Elton John at the Hollywood Bowl in 1972, or '73. He was introduced by Linda Lovelace (of "Deep Throat" fame). Also, I went to a Bob Dylan concert at the Greek Theater (Berkeley) a couple of years ago. I waited until the last minute to enter because my ticket had a seat number and I wanted to avoid the early crowd. Once I got in, I looked for my seat number but learned that the words "General Admission" was code for standing room only, no seats. I guess everyone knew but me!
Not a weird concert per se, but an unusual lineup was a Memorial Day weekend concert in the early 70's at The Joyous Lake, a small club in Woodstock, NY. Richie Havens played followed by the Charles Mingus Quintett and then Bonnie Raitt who was joined during her set by Paul Butterfield and Eric Andersen. Great show.
The one that I did a hit of blotter at was really weird 1974. I saw things that could not have really happened on stage!
The March 30, 1975 Beatles Reunion concert that took place @ the K-Mart Mall, Iowa City, IA.
Kind of along the same line; mid 70's Pink Floyd in Los Angeles at I believe was the Sports Arena. I had bought 6 tickets and sold two of then to the catering truck driver. Ed Davis was the police chief at the time. He wasn't about to let any dope smoking hippies in his jurisdiction. The cops were searching cars at random, frisking everyone and down right spooky. So to compensate we chain toked rag weed all the way down there. Didn't see the catering truck driver & his gal till we sat down. They compensated by dropping acid. I don't think they blinked for 2-1/2 hours. Good show as it was right after Dark Side of the Moon. What a bunch of crazies we were. But no regrets.
Captain Beefheart and his Magic Band, Feb 4, 1972, Irvine Auditorium Philadelphia.

Little Feat with Lowell George was the opener.

Rockette Morton came on stage with a toaster on his head, halfway through the first song, toast popped up. His way of saying 'a toast from Rockette Morton.
Frank Zappa at the Filmore East in 1976. He played a couple of songs we knew, we were all big fans, and then he launched into some complex difficult and interminable orchestrated piece . He had a fairly large orchestra working with him that night. So after a couple of what seemed hours he finished this "song" and said that the concert was being recorded for an album He then turned back and scolded the big band to play it again but with fewer mistakes. No amount of any substance could compensate for his commitment!
A few stand-outs for various reasons. I ushered at a Milwaukee theater called Uptown back in the early to mid-seventies. The tubes put on a very bazaar show. Much stage activity, which was well above my intellect.
Springsteen's Bomb Scare concert. The theater emptied of audience had police, dogs and bomb specialists rummage through for nearly 2 hours. Amazingly, Springsteen came back on played well into the wee hours...appearing far more inebriated.
I saw the Who at Tempe University for Who-loween. I believe it was 1981, with Mellencamp as one of the opening acts. A number of audience members expressed their impatience with the openers, some carrying placards requesting The Who are the best, forget the rest. Somewhere in Mellencamp's set he got nailed in the head by a thrown bottle. He went down, the band barreled off stage. What seemed like lapse of an hour, they reappeared, Mellencamp's head bandaged, wearing a hard-hat. The Who finally came on, they said no hello's, played their music, and left.
My wife and I recently saw Peter Noone, as Herman Hermit at Wisconsin State Fair. Her comment watching an audience of nearly 400, mostly 50-70 year olds bobbing their heads to 60's pop music was as strange as it gets.
One more. About 5 years ago The Flaming Lips opened their show with huge balloons and giant balls rolling atop the audience. Followed by an animated image of nude dancing woman eventually reclining into birthing position...legs bent and spread. A stairway was strategically placed to allow the band to enter through the appropriate opening.
July 2 1978? Willie Nelson 4th July picnic Arrowhead KCMO

Willie, Waylon, Jessi Colter, Jerry Jeff Walker and the Grateful Dead.

Cowboys and hippies, not a great combo
I would say Alice Cooper. I didn't even know who Alice Cooper was before going to the concert, could have been a chick for all I knew. In any case, a friend of a friend had an extra ticket and I went. Pretty bizarre show but the band was surprisingly quite good.
Tubegroover, I saw Alice around 1970 or so (in Tampa) and while he wasn't the weirdest I've seen, it ranks near the top for sure. It sure was the LOUDEST concert I've ever been to, my ears rang for a day after that show. Glad I haven't subjected my ears to too many aural assaults that loud.
- One Lou Reed concert I attended years ago, not outwardly bizarre, but this weird combination of 'eclectic' happenings between the perfomers and the crowd....
- Todd Rundgren's Utopia tour roudabout 1980, one particular concert in Western New York where I swear they were definitely in their own 'Private Idaho'....
- All time winner: Genitorturers during their "Alice Cooper meets Marquis de Sade phase...'
The last one and the most weird was with Gretchen Parlato(voice, marakas, hand-claps and beat-boxing) and Alan Hampton all instruments.
Normally Alan Hampton would play string double-bass, but he expanded himself to play other instruments: guitars and keyboards. Apparently, while Alan is descent bassist, he wasn't able to keep up with other instruments and made this concert truly messy. He wasn't able to catch the loop on the right key and on the right time and was often off the key in guitar and piano YAK!. Also I noticed he was sweating heavy and pale. This happens if dope was used. When you're on dope and trying to be useful, you need to 'catch' the moment when you're not in withdrawal pain, but not too high to be able to function. I guess Alan just got the dose right before performance and probably too big... Dealing with dope consumers is complicated indeed.
A few come to mind. Seeing an act booed off the stage is always memorable. Especially when beer bottles have been hurled at the artists. So maybe it wasn't a great idea to have a reggae band (Toots and the Maytals) open for the Who in Detroit back when no one in Detroit had heard much (if any reggae). Mike Quattro opened for ELP in Jersey City and got the same treatment.

I also recall seeing a Traffic concert at which Chris Wood was so drunk/stoned that he lost hold of his sax mid solo and sent it flying across the stage.

At a Shirts show at CBGB some drunk up front got shoved and started a brawl that moved in slo-mo from the stage toward the back, where I was standing. I escaped seconds before some guy got slammed into the rear wall.
Bo Diddley when he couldn't quite remember how to plug into the amp, and lectured us on taking care of our backs. Diddley Downer
Martykl, your drunken Chris Wood tale reminded me off a couple alcohol fueled shows I saw in the early 70's. The Kinks, I believe it was in the Tampa Armory, were really into partying that night. Ray Davies got so drunk he could barely stand up past the half way point of the show. Later, I saw Rod Stewart in Orlando and he was in a very generous mood. At the start of the show, he brought out a couple cases of German wine and started passing bottles of liquid happiness to the audience members up front.
Martykl I remember that Who concert, I got knocked to the ground twice (along with several others) because a giant wave of people pushed into us.

A bit scary...

Your Kinks story reminded me that I once saw Ray Davies punch Dave Davies on-stage. It was at the Capitol Theater In Passaic NJ during (I believe) the Schoolboys in Disgrace tour. The Kinks were at a low point and there were a few hundred folks in a room that sat a few thousand (IIRC). The band wasn't happy (I assume) about the sparse crowd and you could hear the brothers woofing at each other between songs. After the first encore, as they were walking off, Dave elbowed Ray in the ribs and Ray clocked him.

They didn't come back out.


The crowd was definitely a bit out of control at that one.
Frank Zappa had very strict policy in his band -- ZERO tolerance to alcohol or recreational drugs during rehearsals AND of course stage. His music was SCORED by Steve Vai before each rehearsal while he wasn't familiar on reading sheet music. Listening to his music you would really think that it's pure improvisation, but....

Being weird in unique and interesting way is art and talent. It's clearly different from being disrespectful to the crowd especially due to the excessive amount of alcohol or recreational drugs present on stage.
Hey Taters, I saw them either that same year as well (or perhaps the year before?) not far from you at the Windors Ice Arena. Iggy wore nothing but a silver glittered G-string. What a wild and crazy show it was!

He wore the same thing when I saw him. By far the craziest show I have ever seen and I have probably been to over 200 shows in my lifetime.
The weirdest and/or strangest concert would have to be...The Blue Man Group.All in all,the show was great,if not a bit overproduced.
Double bill at the Nassau Coliseum in Uniondale, Long Island. 

Frank Zappa/Sha Na Na double bill. You read that correctly. 

This ihappened around the time of "Apostrophe", long before his audience would expand due to the inexplicably popular "Valley Girl". 

Suffice it to say that Sha Na Na was awful, the Coliseum was empty and cold, and Zappa played for about 45 minutes.  Maybe. Or an eternity - take your pick. 

Truly the worst concert I'd ever attended.  
Double bill at the Nassau Coliseum in Uniondale, Long Island. 

Frank Zappa/Sha Na Na double bill. You read that correctly. 

This ihappened around the time of "Apostrophe", long before his audience would expand due to the inexplicably popular "Valley Girl". 

Suffice it to say that Sha Na Na was awful, the Coliseum was empty and cold, and Zappa played for about 45 minutes.  Maybe. Or an eternity - take your pick. 

Truly the worst concert I'd ever attended.  

Three way tie:

Polyphonic Spree in a church 

PhilOrch doing Ligeti

Half Japanese at the 9:30 club in DC

Saw the Doors after Jim died but I was too young to know that was a big deal. They were really good anyway and Flourescent Leech and Eddie were great but kind of a strange opening act.

Great Canadian Picnic, summer of 1980.

Great Canadian Picnic

Hailstorm and crazy winds in the afternoon so concert suspended for awhile due to safety. Got some acid when we went to the parking lot to ride things out. After that everything was fine! Saw Frank Soda and the Imps for the first time. What a show. Here’s a video of Frank Soda:

Saturday Night Getaway-Frank Soda and the Imps

Deep Purple was crap and were booed heavily. Concert was stopped in the wee hours of the morning, after a stabbing. Near the end, there were many piles of beer cans as high as your head, clothing, garbage and people littering the ground. We didn’t need to buy beer because we brought in a watermelon filled with liquor.

@jeff4598 - interesting you mention Jeff Buckley - one of the weirdest concerts I was ever at was Jeff Buckley at the Brainwash in San Francisco. The Brainwash was a laundromat that had a small room upstairs where they would sometimes put on music for 40 or 50 people sitting in folding metal chairs. This was well before his album came out; I wasn't even familiar with him; the girl I went with was a big fan. Great gig!