Here's a famous concussion video when things were taken less seriously -
"That famous goal from Game 6 against the Devils is the most widely known concussion, except by Kariya himself. Speaking to TSN years after retiring, in 2017, the former star noted that he had no memory of the hit, returning to the game, or scoring arguably his most famous goal."
LinkKariya comes back a few minutes later from a hit that was 10x harder than what Tua experienced, and was seemingly coherent enough to score a huge goal in the stanley cup final. While we now know a lot more about concussions, head injuries are still a mysterious beast.