Warren goes into the school to save her, and he discovers the adult monster, who kills every one of the Cretins. Warren finally zaps the beast with a laser in the physics laboratory, and he and Chrissy flee from the school, right after the monster explodes along with the school, also killing Mr. Paley inside. The students celebrate victory as over the loudspeakers that the school will be shut down for remodeling. While reconstruction is taking place, one of the monster "babies" appears squirming through the remains of the destroyed school. The screen freeze frames on the creature as the screen inverts, shortly before fading out and the credits roll.