i really enjoy watching sci-fi/fantasy movies when im blazed, especially any of the LOTR movies. as others mentioned, fear and loathing in las vegas is also great, the movie is meant to make you feel like your tripping and believe me it does. but my all time favorite movie to watch when stoned is half baked. "get me a box of condoms, and some of that stuff, whats it called? we used to eat it all the time back in the day. oh yeah, pussy." dave chappelle is a genius.