here are some of the weirdest tracks/albums I like out there:
Sunn o))) White 1; the first track is absolutely wacko stuff yet really really good.
Aphex Twin Milkman, Beetles
Ozric Tentacles: Strangeitude (the title says it all)
Magma: Wurda Itah, Mekanik Destruktiow kohmandoh, Kontarkosz
California guitar trio : Threnody for souls in torments
Carcass: symphonies of sickness
Deicide: Satan spawn, the caco-daemon
Pungent stench: klyster boogie (and just about any album made by them. pretty freaky stuff out there. be warned: hide the wife and your children before you play this stuff!!!)
I got more stuff but this is a good start to freak anyone out.