You ever watch any of those old kung fu movies from the 70′s, where fists wouldn’t even come close to a person’s face but they’d still go flying six feet?
This is kinda like that.
As you’ll notice, it’s excruciatingly obvious that this guy never even gets touched before he flops to the ground:
In his defence though, it turns out that he was a last-minute replacement, and (since his opponent is NFL defensive end Ray Edwards) he was basically worried about having his head exploded with a single punch as shown below. So I suppose you can’t really blame him.