is this legal? im not a coach im just a parent but i always thought refs werent allowed to put there hands on kids unless there is a potentially dangerous move or they didnt hear the whistle? please watch this video of my son wrestling he is in the red and black and tell me why the ref felt the need to grab his arm and pull it down then pin him right after?

http://www.youtube.com/watch?v=II25ojup3HQ