Jimmy "The Tulip" Tudeski: I'm gonna keep the coke and the fries but I'm gonna send this burger back. And if you put any mayonnaise on it, I'm gonna come over to your house, I'll chop your legs off, set fire to your house, and watch as you drag your bloody stumps out the door.
When Mathew Perry goes to Chicago to meet with the head Boss, Bruce Willis' wife comes to talk with him at the hotel. In the scene where he is brushing his teeth he picks up the mouthwash bottle and swigs some, then sets the bottle down on the counter. The camera cuts back to her, then back to Matthew Perry, and the mouthwash is gone.
Matthew Perry bet Bruce Willis that if the film would open at the top of the charts in the US (which it did) he would have to guest in an episode of Friends for free (which he did, plus all further episodes payments were given to charity).