Unleash the tiger in you and get your upper body working and your palm heel strikes flowing with the Iron Claw workout. The heel of the palm is one of the few natural weapons we have. Naturally hard with very few nerve endings it can take (or deliver) a blow without risking damaging any part of it. Learning how to use it correctly suddenly makes you armed and dangerous just because you have a couple of arms and they have hands which have palms.
Extra Credit: 30 seconds rest between sets.