He had that first wobble 100%, and it looks bad when you're actively looking for concussion but also maybe he just slipped or had a misstep or was momentarily dazed? Like it's not Sami Kapanen or Jonathan Toews stumbling continuously to the bench. Perfetti seemed good after that one stumble, chatted with his bench, went over to chat and laugh with Mangiapane, then left to get checked out. Even if he passed the tests, I wouldn't put him back in. Concussions can take time to show symptoms, even if I'm not seeing it I'm not risking making it worse for a preseason game.