Concussions are taken quite seriously these days. I've actually had three students so far this year be diagnosed this year alone. Each one is told not to do ANY sort of schoolwork as the brain just needs to rest.
I would imagine that if this WEREN'T show related, the production would be making sure that we all knew about it in a big way. They are (likely) figuring out the best way to spin this.
As far as WHO will protect the actors, the stunts were approved, so this will likely be claimed to be user error or other "not our fault" type of excuse.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.