As you can see in the following video, the former Bruins defenseman first got into a wrestling match with David Perron in front of his own net. Visibly frustrated after having his helmet ripped off, Krug charged at Perron but the Blues forward opted to change.
Ironically enough, the Blues went on to sign Torey Krug just a few weeks later. He's been in St.Louis, skating alongside both David Perron and Robert Thomas since then.