In the TV show "Supernatural," some of the most memorable moments were completely unscripted. For instance, in one episode, Jensen Ackles improvised a punch that added a hilarious twist to the scene where Dean punches Sam after a demon possession. Another gem occurred when Jared Padalecki and Shoshannah Stern collaborated on a joke involving Sam accidentally signing the F-word to Eileen. Let’s watch the video to see these and other spontaneous moments that made it into the final cut...