That's Linus Omark at the dot. He and Tryamkin were at each other, then Omark got tossed from the faceoff and Tryamkin flipped him the bird.
Watch after he gets chased from the dot, he skates over to take position in front of his goalie and makes his own hand gesture towards Tryamkin... looked like he was tapping his knees for some reason (use your imagination here) then Tryamkin gives him the salute and gets tossed, lol