Vigo the Carpathian stole Dana's baby. So, Louis Tully stumbles out of the Ecto mobile, completely naked. BUTT NAKED. Venkman's yelling at him to get out of the way. Then Louis strolls up to the painting, and says 'Boy, the super nintendo's gonna be pissed.' And he chucks a bottle of kittens at Vigo's head and the baby never hits the ground. That's why they call Louis Tully the Extreme.