It may be a bit unfair to the individual at Forest but the process around it I'm not so sure.
It's taken years to get away from the "Tell him he's Pele and get him back on" mentality around concussion. We've now got concussion protocols and a bit more than a magic sponge and a Terry Butcher...
Slightly gobsmacked that the medical staff cleared him to play on. He's gone from "He'll be fine" to a life threatening injury. Sometimes I think medical diagnosis is just a massive guess up.