That's a fairly significant crack in your helmet -- seriously. Best wishes on a speedy recovery.

On that note, I've read that your brain heals better from physical injury if you don't think too much. It's one of the reasons a medically induced coma is part of the treatment in some cases. Or so I've read. Apparently the brain needs energy to think (who'a'thunk) and the same energy is required to heal from trauma such as a concussion. Coma fixes the thinking part so the brain can concentrate on healing.

On a separate topic, the helmet I bought 25 years ago is probably beyond is "use-by" date. Any recommendations for a replacement? All I used it for was holding a mirror and it excelled at that task. Never put it to work like Blast.

Again, best wishes for a full recovery.