some interesting feats of grip strength (from the Dino Files):
Herman Goerner - 1 hand deadlift 602 lbs
Herman Goerner - pinch grip 111 lbs to dead hang position
Doug Hepburn - tear an auto license plate in half
John Marx - tear two decks of cards in half
Charles Vansittart - tear a tennis ball in half, tear 3 decks of cards in half
Adrian Schmidt - one arm chin holding on a chain with just his thumb and forefinger
Mac Batchelor - bend a beer bottle cap with only thumb and forefinger, with a dime inside the cap
Hans Steyer - lifted 582 lbs off the ground with just his middle finger hooked through a plain iron ring
all drug free