I once was practicing my punching when I was doing Shotokan for a little bit, and popped my middle knuckle very bad. I almost cried, and the sensei I had felt very bad. He then sat me down and got ian ice pack for me. After twenty minutes, it was numb and I continued the lesson. We finished the rest of the lesson with feet. I lived very close at the time and he drove me home. After that, I participated in Tai-Chi instead and loved it. I was hurt bad and was in tremendous pain. He was a good guy, and he said I was welcomed back in Shotokan anytime I wanted to, and I was still a fighter. Shotokan was hard to do. It took my knuckle a few months to heel. Sadly, he got into a bad accident which now has him disabled and was forced to close down his dojo. I haven't seen him since, but know he is no longer capable of training again.