What Makes You Cry?

At lunch today, I overheard a woman at the next table say:

"You know what really bad movie makes me cry -- Galaxy Quest. Every time."

As a fan of science fiction and satire, I don't really consider Galaxy Quest a "bad movie" but I understood what she meant.

There have been many times while watching what I considered a mediocre film that I felt myself tearing up. It's amazing what a performance, or a piece of music, or a line from a film can do to you.

What bad movie makes you cry? Why?

What less-than-stellar film would get to your main character?