What is the worst movie you have ever (partly) seen?
Not a movie that is so bad you watch it again to complain about it (Superman 3, Star Trek 5) or even a movie that is just plain wrong (Ten commandments) or "wrong" (Bill and Ted's) or anything of that sort. Rather a movie that is so horrid, it is unwatchable the first time around, let alone a second time, or you feel like paying another person just so they don't watch it.
The only move i think i couldn't finish watching do to it's absolute horridity is Home Alone. (Culkin is even a worse actor than Daniel Radcliffe). Other movies would be Superman IV, Star Trek 10, and Spiderman. All of which i cannot imagine watching again without a very good reason. They are not good, funny, or have any merit whatsoever. At least in my opinion.
What would be your list?