You knock on the door to a nearby stall.
"Dad? Are you in there?" you call out. You hear a rustling noise and hear a voice cry out. "Dad? I'm scared, please open up..."
Still more rustling comes from the stall, but no response. Suddenly, the door opened, and out came Dad, who was now shrunk to half his size! AND he was naked, due to his clothes not fitting him anymore.
And he looked sorta bat-like, as well.