Excuse me, Butthole Surfers are insanely accessible for sane people.
As far as rock&roll goes these guys are nuts + they make great music. Together with Ween/Moistboys they kicked rock&roll in the ass my dear friend.
You said any genre so I picked rock&roll and I am not gonna argue with what is crazy/insane and what's not.
Compairing psytrance with rock&roll is ridiculous, they are 2 totally different genres.
I have got the feeling a lot of crazy and insane music is gonna be posted here which will sound boring or crappy to me, no offense, please do so.
Nice track from Talpa btw
http-~~-//www.youtube.com/watch?v=XEuKiqnnOPM
http-~~-//www.youtube.com/watch?v=s65uGF6aog0