The weirdest/most hysterical/worst movie I have ever seen was called Bloodfreak. It was made in the early '70s and I ended up watching at like 2 AM because the description sounded so bizarre I just had to watch it. It's about this guy who ends up with some party girls and then he somehow ends up on this poultry farm looking for a job and before you know it he's eaten some experimental turkey and is turning into a turkey and terrorizing druggies. The sound track and "special effects" were the best things I have ever heard/seen. As was the acting. If you're into those really low budget "d" (it's so bad it's not even a b) movie that are so bad they're entertaining- I would recommend it.
Okay weirdest has to be The Last House on the Left..the old version. It was horrible. Wasnt even scary, just horrbile, discusting, and hilarious how dumb it was my best friend and I were laughing hystrcially at how pethetic it was haha. The Exorcist...okay I can't even think about that movie...haha it just creeped me out. When my friends and I watched it they thought it was funny but I HATED it. Like I can't even look at someone with the name Regan the same way anymore haha. And Hostel was nsaty too! Me and my best friend watched that the same night we watched the last house on the left...i almost puked. The first half is porn...the second half is people throwing up and crying and being totured. Haha.