Lucky he didn't pick me or some of my friends from work. 22 years of training has led to a slightly different reaction to being assaulted like that. It's one reason I don't carry any weapons but even unarmed my first reaction to something like that is to immediately attempt to inflict some sort of incapacitating injury on whoever is on me.
My brother was in a situation like that. The guy who jumped on him intended to beat my brother until he couldn't move and then rob and/or kill the rest of his family, on the spot. If my brother had been carrying like he used to do, the perp would have been dead. If that tv clown had jumped my brother or any of HIS co-workers like that, he'd be dead and we'd all feel so sad but no charges would have been pressed against the shooter. You jump on a cop or military member's back at your own risk. Stupid stunt. As it was, I'm pretty surprised none of his victims sued. In civil court, assault has nothing to do with perpetrator's intent and everything to do with victim's perception of the events as they unfold. That guy jumping on someone's back is cash money in the bank for the victim, even more so that it was pre-planned and videotaped. Juries and judges often award extra for that level of detailed planning and intent.
Heck, it would almost be worth the extra injury to my back if he jumped on me. I'd get a chance to practice some kung-fu and walk away from it with enough cash to retire in a nice beach house, plus his employer could reimburse uncle sam for the cost of medical treatment for my back injury for the next 50 years. Save us all some taxpayer dollars while we're at it.