Have you ever been to a movie so terrible that you saw people leaving the theater? Which one was it?

Robocop. When the bad guys kills Murphy a lot of people walked out the theater. Was enough for them. I keep watching the movie, I was 13-14 at the time, and quite enjoying the film. Animatronics was nice back then and the plot, where a guy die working and someone bring him back to keep working, was ok.