questioning the street

This morning while watching a dream sequence on Sesame Street involving Bert and Ernie where Ernie was on a flying and galloping bed that went through the clouds as the clouds came to life Finn turns to beautiful and asks "mommy, how does the rubber duck stay on the bed?" He doesn't have an issue with a bed that comes to life, runs and flies through the clouds that then too come to life and chase the bed. That seems perfectly reasonable to him but with all that craziness there is no way that rubber duck stays perched on the head board, that's just crazy talk.