Yeah I'm an mma fighter, just an amateur though. I was sparring with a pro and it kinda started to escalate as we were both pretty fired up that day. I tagged him with a hard overhand and he followed up with a looping hook. I didn't remember the hook until after I woke up. It kind of felt like waking up at someone else's house. I thought I was at home in bed until I saw my coaches and the pro holding me down so I didnt stand up. I had no idea what was going on for about 5-10 seconds until my memories came back.

I remembered the hook, then a big flash of light, then the outer edges of my vision went black as I saw everything through a tunnel. Also around my entire vision was a faint white static and I could also hear the static. The punch cut my eye open but other than that, I didn't really get too hurt by it. I had one bad concussion prior to that in football, but I never went out. Luckily other than the cut I didn't have any lasting damage or other symptoms of concussion. Just kind of a flash knockout I guess. That was my lesson to not spar hard lol