Maurice does not like it when there is a thunderstorm.
Maurice does not like it when you run the wet vac machine.
Maurice ESPECIALLY does not like it when he hides from the thunderstorm, and you scare him out of his hidey-hole to retrieve the wet vac machine, and then RUN IT FOR HALF AN HOUR.
Maurice thinks he will find a novel and surprising new place to void his bladder.
Just you wait and see.