I totally forgot to mention, even though it's not a movie, back in the day when I used to get stoned, the best thing ever to watch stoned, was Twin Peaks. The best, most bizarre TV show ever. Now that it is being reshown on the Chiller network, I get to enjoy it's weirdness all over again.

http://www.youtube.com/watch?v=gMXjjHFz__A