Scariest one I ever had, I was a dback and tried to come diving over a scrimmage line pile to get to the rb but I didn't see the bigass guard that had a bead on me. I came in horizontally and took the full impact straight to the top of my helmet. Felt like my whole body accordioned and every bit of air left my lungs.
Wasn't the first time I'd had the wind knocked out of me so I'd been through the whole trying to force air back into your lungs thing before, but the fact that it had happened from a blow to the top of my head rather than to my chest scared the hell out of me in the moment.
Once I got breathing again and realized everything was still moving I figured I was okay but it still gives me the willies to think about.