In the episode where Keenan draws a picture of his principal, Kel leaves it in the principal's office. When they try and retrieve it, Kel accidently sets off the fire alarm. The sprinklers come on, and the door is broken down by a fireman, but he then turns the light on. A stupid idea in anyone's book to turn a light on when there is water on, but for a trained fireman to do it??