There is no punch, when delivered properly (this one was) that is more damaging than an uppercut. We were taught to crouch before delivery, then follow through. This man has it down.
When I was in college my roommate, who was a drunk, was making fun of an Irish girl from Lon Gyland. She talked through her nose. She got so mad at him she gave him a straight right to the midsection and a perfect left hook below his ear. All he could sputter was "She hit me! She hit me!"