2-piper. I have had several "friends" who like to play the gorilla hand shake game for reasons which elude me. Not by accident for certain like your friend. I quickly learned how to reverse it and made a point on not stopping my grip until tears formed in their eyes, they started breathing with labor or they asked for mercy. It took a while for the word to get around to not play that game with me and then for the dumb ones to try their luck with me anyways. Can't say I never lost one of those stupid games but almost every time someone has tried it they came up with a numb hand.
I suspect my father was right when he told me that a working man could do things without thought that a office worker types needed effort to do. His point was that men who used their hands to make a living had much more natural strength than almost all others. We use to call it country strong for those who grew up on the farm. I was one of those boys. By age eight or nine I was big as most twelve year old kids and I could easily move hundred pound bags of fertilizer, two cement blocks in each hand or bags of cement all day long. Glad I don't have to do it anymore that was a lot of work.