A bowel movement beginning as a solid production, but turns violently into liquid just before finishing.
Man, after a hard night of drinking at that bachelor party in Vegas, I got stuck with a watery ending! I needed two courtesy flushes!
A water crash landing in an airplane.
Flight attendant: "In case of a watery ending, the exits are to your left and right." ::hand gestures::
Captain: "Ladies and gentelmen, please prepare for a watery ending."
-euphoric captain voice-