I've a 'sampler' CD of various Houston bands received at a street festival, mostly ok stuff, no stand-outs but...
One is a 'bluesy' sort of thing, reminiscent of 'Cocaine' in it's rambling way.
It's hidden 'surprise' is that it 'skips back' randomly, much like a LP, but it stays within the song itself.
You can play it for hours....the skip can be a few seconds, a minute +/-, no real pattern....
Literally, this song goes on potentially forever until your player breaks or a power fail. No visible damage or dirt, I've checked.
I've thought of putting it on during the later part of a good-sized party as background sound .... to see if anyone would notice...