There was one method an old teacher of mine told me about that seemed pretty bad.
Basically they'd put a two boards beside each of your legs (kind of like full leg splints), then pack them with sawdust and tie them as tight as they possibly could. They'd then put your legs together and tie ropes around both legs as tight as possible, squishing your legs. Then, wedges would be driven in between the boards that are sandwiched between your legs, compressing them further, to the point where all your bones in your legs would shatter and your blood vessels would burst. Your legs would be just smashed pieces of meat. Oh, and they'd whack your feet with a hammer until they were all smashed too. Then they'd undo all the ropes and let you flop around on stage in agony in front of all the townspeople, then string you up and let the birds go at you.