My 14 yr old Son received his brown belt in December.He worked really hard for it and I am so proud of him. When classes started again after the Christmas break he said he didnt want to train at our dojo any more. I thought he maybe just needed a break so I didnt push the issue. He still trains every day at home going through his katas and doing pushups/situps etc..(he also plays soccer) after a couple of months I asked him if he wants to rejoin the training. His answer was that he is afraid he is going to hurt someone accidentally. He said he dosent mind being thrown or sparring himself but he has developed this fear of hurting someone else if they land wrong , or in sparring if he hits someone and they duck the wrong way. He has just had a big growth spurt and is now 6' and wiry. His strength has increased a lot too( I have felt this when grappling with him). Do you think this is a passing phase and maybe he is just adjusting to his new body or is there something I can do to reassure him.