I have to agree with Seienchin. We have had a couple of high grade students who consistently hurt (break ribs, knock out) our students. These same students stuggle in tournament because they aren't good at percieving when they have truly hurt their opponent or how they 'present' to onlookers (specifically judges) in relation to their opponent. They don't agree there is a problem. They think they hurt students 'by accident' & are just unlucky. They're wrong.