How did he 'get control'? How did he bounce the guy away? What does this demonstration tell you about how he trains his body?
I can't really tell ... Seem like somehow the 'attacker' either has good structure or structure is established by the 'pusher' (in the attacker) otherwise there is nothing for the power to "go into". Kind of like one cannot push with a rope very well since there is no structure to convey the force.