Somewhere in the Zippo museum is one of mine...stopped a grenade fragment from poking a hole in my leg.  Sent it to Zippo, told 'em what happened, and they asked if they could keep it <img src="/images/graemlins/smile.gif" alt="" />  They sent me a new one. 
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Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space,  a critter that can be killed but can't be tamed. --Robert A. Heinlein