Erik Karlsson apparently wore his dancing skates for the NHL100 Classic.

Cameras captured the Ottawa Senators captain dancing and clapping along with the crowd at Landsdowne Park while sitting on the bench during a third-period stoppage in play.
Karlsson may have been keeping it loose during breaks, but he did serious work against the Montreal Canadiens. The Senators defenseman was named the game's No. 1 star after scoring an assist and leading all skaters with 32:55 of ice time in the Senators 3-0 win.
It all added up to a for a fun night for Karlsson and Ottawa.