>> whoa, whoa, whoa, whoa. >> reporter: one of them, a 13-year-old, was injured and needed a cast on his wrist. tell me how martin is feeling right now as he's being carted off to jail. >> he's accepting what's occurring and he's making his amends. >> reporter: in handing down the sentence, the judge said the postgame handshake should be a symbol of sportsmanship, and the last place anyone would expect an adult would assault a child. he compared it to a cowardly suckerpunch on an unsuspecting victim. >> well, it certainly sends a message. >> reporter: the president of the hockey association where he used to coach hopes that message gets through to coaches and parents. >> to succeed in sports, you often have to have passion, but you need to have control. >> reporter: tromblay's outburst has cost him his marriage, several construction contracts, and his volunteer work with children. >> he put in years and years working in hockey and a scout master and that's all over.