*Charlie and the Chocolate Factory (made to be watched while on drugs)
*Pink Floyd movie, "The wall." I haven't seen, but I've heard things.
*The Mariah Carey movie "Glitter." Not because it is trippy, but because you have to be on drugs to sit through it.
*Metropolis. That one really old movie. Good stuff!
*Any Ridiculous comedy. Such as Monty Python stuff, Naked gun series, Kung pow, and such.
*Space Odysey 2001. I have never seen it, but I hear it is long and boring, and may be of special interest while on drugs.
*The Matrix trilogy. Just because.
Any other good ones?