Superheroe League of Hoboken
I generally find it's better to beat your foe senseless using their own arm.
How about their own legs? Ouch!
You know, there was a giant robot game where you could do exactly that. It was a RTS that involved a war between three brothers each leading a corporation. You could dismember enemy.mechs and take their limbs. I can't recall the name though.
[EDIT] It was called Metal Fatigue.