Once in a blue moon one of my pythons will turn his or her tub into a veritable SWAMP.

They invariably choose to do this .02 seconds before I'm supposed to leave for a week, so instead of being on time, I end up perpetually late since I have to stop, dump all the nasty bedding, sanitize the tub and wipe it dry, put in new bedding and put the snake back before I can leave.

Their sense of timing is impeccable.