Martial arts instructor and treeguy. Nuff said.
..
..
Layout by CoolChaser
..
..
Other martial artists of any discipline that have a realistic understanding of his or her capabilities. This means that you need to train with some kind of contact other than a completely passive uke/training partner. I am not saying that you need to be a full contact fighter or destroy your training partner as if you were in a death match, but you need to hit and be hit, throw and be thrown, submit and be submitted to find a true understanding of combat.