A buddy and I used to slide down the tin roof of a barn they had, until he decided one day to go off the backside and ripped his A** on a nail sticking up about 2 inches. We stopped after that. The Gash measured about 8 inches long.

And when I was younger than that, me and another buddy would ride on the draw bar of a tractor the city utility worker mowed the city grass with. He turned a real sharp turn one day and threw my buddie's legs between the tractor fender and the wheel. Broke both his legs in numerous places. He was in a full waist to toes case on both legs for about 6 months.