Trust me on this one, way way back when wrist rockets came out, I proved that you can not kill a snapping turtle by bouncing marbles off of its back. When I lived on the south east shore of Storm Lake I was invited to out to the Little Sioux and go turtle grabbing. It sounded way way mucky for me. They came back with a pick up load of pissed off turtles. One of the turtle grabbers hand to go get his hand stitched up, old submerged pickup in the river bank, and another had to go to the emergency room to get a large rusty treble hook taken out of or off of his crotch. I have no idea how one can get a treble hook in his scrotum, but it ended the turtle grabbing for the day.
Oh yes, my wife made a big batch of her special potato salad which got us invited to the turtle feed, it was excellent.