This is one of the 'bombs' that Feng had mounted throughout his compound where the ping pong tournament is held. This is one of the 'stunt' versions with no electronics. When they were activated in the movie they lit up by what looks like 4 white lights around the largest piece in the device, and then one red light behind the half-moon shape on the center piece in the device. The electronic ones are also identifiable by two screws on the left and right of the large internal piece. These screws are visible in the movie when the flashing bombs are shown on screen. (I would love to get a working one with lights!)Some screen shots. You can see one in it's activated state behind Randy and Feng during their final match. The red light mentioned above is actually a flashing light, so it's not seen as much.
