Now a drill for the power backs. The off-arm is an under-utilized weapon for the RB. Most RBs know how to use the stiff-arm to keep a defender away from them; however once the defender is right on the RB, the Boom Drill is what we use to help them to run over the defender or break the tackle. We teach our RBs to use this right upon contact or immediately after contact to help gain separation from the defender trying to tackle them. It is a very violent and explosive move by the RB, especially the Marion Barber clip at the very end of the video. It happens so fast, that even though I slowed it way down, you can still barely see it.
RB Boom Drill @ Yahoo! Video