Eight years ago i received a kick in the nads during sparring(a side kick counter to my back kick ) To save face i quickly recovered and continued sparing ( I had,nt long achieved black belt ) After training i had little feel and found the left fella was growing fast. In the car on the way home i went into shock ( blood supply to exextremities cut off to save brain ) I had split one of me nads! I was in hospital five days, Out of work for three months, Out of training for nine months. I eventually achieved my 2nd dan. Moral to this story is. No matter how good you think you are,Always ware a box when sparring