There are three that depend on what kind of bad day; <img src="/images/graemlins/grin.gif" alt="" />
If someone made me really mad: The Fifth Element (I know most people would consider this action, but it is hilarious!)
if I just need a little bit of hope: While You Were Sleeping
And if I jsut had a real bluesy day and need to laugh hysterically: Rat Race (the 1st time I saw the scene w/ the cow I had to make my husband stop the tape because I almost peed in my pants!)
2 other good stadbys are: Miss Congeniality and Bruce Almighty (when he made the other newscaster speak gibberish - Auuuuughhhh!)