What was the worst movie you had to sit through in a theater?

When I was 13 my dad took me to watch "All the President's Men" (about Watergate investigation), because it was, you know, history and all that. I literally fell asleep in the theater, I didn't have a clue of what was going on... That has been the only time in my life I've fallen asleep in a movie theater... Maybe the movie wasn't so bad in itself, just not suitable for my 13-yo self...