I really should have walked out of Bruno, however, I was with a friend who really wanted to see it, so I had an out-of-body experience by walking out of my consciousness instead.
Also, during Bangkok Dangerous (with Nick Cage) I walked out of the theater, down to the bar (theater is in a mall, located next to the pub) had a double shot of whiskey cased with a pint of lager, went BACK in the theater and passed out. Yes, it was neccessary to get my statement through by doing that.
Actions speak louder than words, if you really think you should walk out on a movie, by all mean, get the fuck out. Perhaps even sneak into a better one.