I know that feeling Theo. I had 2 concussions too. I was washing my tractor with a pressure washer. I had raised up my front loader to get at the front of the tractor better. I remember pulling the hose and walking around the front of the tractor, and the next thing remember was looking up at the sky. That loader bucket didn't even budge. Another time I got dinged playing football, and ended up in the girl's restroom. I had to get help finding my locker. It was almost funny.