You've gotta love this video, whether it's for the gratuitous use of cool hi-tech equipment and imaging, or whether youre trying to learn to hit harder or defend against tough guys. Check it out...
The most interesting part is not that the boxer hits hardest, but how clean and effortless his form is compared to the others. The other guys make this look hard, which means that they are taking a lot of recoil from the target. The boxer appears effortless but look how much oomph he puts on that poor dummy!
Also particularly interesting is the cool graphic explanation of coup-contrecoup injury.