To test the effects of stress on the human heart, a man (Jonah Hill) is hit repeatedly in the testicles by tennis balls fired from a tennis ball machine. Things get more bizarre as he continues to get hit even though the machine is turned off. A ghost hunter (Kenan Thompson) reveals to the host of Science Finders (Andy Samberg) that a ghost (Taran Killam) is the one hurling balls at the man. The man flatlines and a doctor (Fred Armisen) uses hits to the groin to revive the man. (thetvdb.com)