Great movie to watch while your...
...tripping on shrooms. I watched it once with some friends...tremendous stuff. The fidgety, schizophrenic nature of Ernest, the midget troll, and of course the Murdock boys knocking over the haunted house...classic moments.
Other good movies to watch while tripping that I recommend:
The Cat in the Hat (Mike Meyers edition)
Bram Stoker's Dracula
A Nightmare on Elm Street Part 2
Troll
Puppet Master
Session 9
any others anyone would recommend??