Obama would've wet his panties and went screaming of the stage, "Reggie! Reggie! Protect me!".
Trump was about to duck and hit the ground. Not attack anything.
Not that that is the wrong thing to do. Even Reagan told Nancy that he forgot to duck when attacked.
But no, Donald is not going to do some wrestling move at his age, he would do just like every other candidate would do if attacked, get down on the ground and make themselves as small a target as possible.