On the note of Jack Black, Tenacious D and the Pick of Destiny is a personal top pick - especially stoned and with a guitar in your lap to throw in a little soloing over the song breaks!
slumdog millionaire is absolutely terrible dude really bad acting and direction watch 25th Hour, I just saw that and it's excellent.
I watched "Inception" whilst i was off my face, had no idea what the film was about before hand which was even worse, biggest mind fuck ever. it was awesome.
Oldboy is indeed an amazing movie, highly recommended! Another film to get really high too is Interstella 555. It's an animated movie with the only sounds being Daft Punks soundtrack. The music plus some mind boggling scenes makes it one of my faves. Also, Eternal Sunshine of the Spotless Mind
If you want to watch a tripp movie for free watch Enter The Void on netflix. crazy ass movie. suggested when super baked
you got to watch Birdemic i just signed up to tell you this but not alone and maybe you will vomit because the movie is sooo bad you just got to watch it baked