A bunch of my friends and I would spend lots of time on a farm 5 miles from my house when we were young. We loved riding the mowers cutting grass and tinkering in the main barn. The owner retired as a foreman in the mill so he hadn’t worked the land in years. He would grab a 16 pound sledgehammer and stick his arm straight out and slowly bring the head of the sledge down and gently touch his nose. 10 times, each arm. We almost killed ourselves trying that.