One movie comes to mind:
ERASERHEAD .... uhh yeah, the greatest film ever made; seriously, david lynch captured something in that movie that is nameless and timeless.
... although I've never watched it, or any other full movie while high on lsd. I really love being outside, sometimes I'll watch a little bit of something during or after the comedown tho. I watched a few episodes of 30 rock recently after peaking and coming down, and it was quite enjoyable; sitcoms in general seem to relax me, the characters are comforting and soothing, as is the plot. Wonder what that says about me...
Yeah I got a thing for tina fey