"Clap your hands if you believe" might have been a story, just made for TV, but when Jensen as Dean yelled out his famous line, "Fight the fairies!" it just so happened that Puck was passing by. The line horrified him, so he went to the Seelie court to tell the queen. Now, the fairies have decided that they're going to fight back, and the J's are going to have to defend themselves or...