A series of unfortunate incidents in 2001 involving the Great Khali is a sobering reminder that concussions can not just end careers but can be, at worst, deadly. As the story goes, a trainee in All Pro Wrestling named Brian Ong was participating in training despite reportedly already having a concussion. Ong, apparently trying to make up for sloppy work, was instructed to receive a "flapjack" maneuver from Khali (Giant Singh at the time). The two weren't on the same page as Ong landed on his head after at least two attempts at the move. The extra head trauma combined with the current concussion was a tragic mix and Ong sadly passed away from his brain injuries shortly after. The exact details of the incident are a bit murky and vary slightly by reports but what is known is that Brian Ong's parents sued APW in a wrongful death suit which they won. And while a concussion related incident to a near anonymous trainee is by no means the most famous concussion in pro wrestling it certainly is the most tragic and an important reminder of the worst case scenario when dealing with brain injuries.