During the episode "Swap Meat," Sam is targeted by a high school student that possesses a body-switching spell. What happens from there? Watch this clip.
This is funny stuff. In the Supernatural episode "Changing Channels," Dean and Sam act like characters from other TV shows. In this case, Law & Order-like detectives!
Why do they call this place The Empty? It's full. It's full of sorrow and despair playing over and over again of angels and demons dreaming about their regrets. Forever.