Can you punch someone and send them flying using your arms with the aid a muscle enhancing exoskeleton?

I can crush tin can with a single punch using the muscle enhancing exo.|||Newton's third law says for every action there is an equal and opposite reaction. If you can send someone flying then expect the same force going in the opposite direction. Thus if you don't have the legs to brace yourself for this then you will suffer the same fate of flying backwards. Hollywood movies in general violate this law of physics as they shoot people with heaving machine guns and blow them back and yet they are standing still.