I say SLAP the mat.If it is my boy on bottom or top.Here iy why.If the boy is hurt bad that will get the boy doing the damage off him fast.I can not think of any better whay to help a hurt kids than to get what is hurting him off.Now if the boy is faking this will also fix the problem.

There is a few times to stop them.EYES are one of them.Fingers also, I know a few boys that have had bad finger sprains and still come bad and win.But most of the time IF the kid is realy got hurt he takes a lose anyway.