The most recent one I have added to my collection was Pineapple Express. I wasn't very impressed with Seth Rogan until I saw this. And James Franco was also a huge surprise! A very unlikely duo--
Also one of my all-time favorite's Reefer Madness---still one of the silliest movies telling a cautionary tale about the dangers of marijuana-induced psychosis. My daughter has the poster now in her dorm room! LOL!!!
Ah yes---Almost all of the Cheech and Chong movies (Oh, God, that's the scene with the nuns. Man I love those guys!), but the topper! The Big Lebowski (The Dude!!!!!!!!!!!!!!!!!) I love that first scene where he's in the grocery store drinking milk in his bathrobe!!!!!!!!!!!!!