Dispose of the Buddy (2011)

2 friends, Brad and Randy, are playing the latest video game. Randy can't seem to catch up with Brad's skill with the game, which causes them to argue and eventually fight. Randy, out of frustration, hits Brad with a blunt object, knocking him unconscious. Randy, assuming he killed his friend, attempts to bury him, only to have the tables turn as Brad wakes up, and accidentally "kills" Randy and attempts to bury him.