At a game Friday night both teams were using the onside/pooch kickoff method during the course of the game. At some point during the game, Team A does the traditional onside kick and to my amazement the kick actually bounced behind A's 40 yard line. A player on Team B alertly scooped up the ball and made a nice gain before being tackled. I have witnessed punts that failed to pass the line of scrimmage but never a kickoff that went backwards.