Pettersson had the puck down below the Oilers net and Darnell Nurse comes in to lay a big hit on the 25-year-old, who was in a vulnerable position. The hit caused Pettersson to smack his head on the boards and was down on the ice holding his head for a few seconds afterwards, before getting back up. But thankfully for the Vancouver Canucks, Pettersson was okay and stayed in the game.