When I read this post, I first thought of maybe the coach was trying to put in the element of performance and how much an athlete must be focused on what they are doing when they are performing... When athletes are performing, they must encountered worse distractions and the athletes must be able to shut out these distractions, but I am not making any excuses for this coach's action, but I do not know, his/her reasoning for doing this... I remembered the coaches will do distractions and the athletes were in hyper focus mode in the routine or what they are doing at that moment they all were able to shut it out...