There was this movie that Paris Hilton was in, no it wasn't the one with Chad Micheal Murray but another horror film that was obviously done on low budget. It was so lame, that my friends and I were like.. yeah.. smurf this, and shut it off.
Lightning Jack Flash.
I walked out along with my date and then was forced to wait for my sister and her date to finish watching it. They thought it was great. That was the last time I went on a double date with her. Not to mention the last time I ever listened to her opinion on whether a movie was good.
Haven't had to walk out since... though I considered it with Hercules.
Good policy.