When I was a HS FB player, my team did not have a helmet big enough to fit my head (insert joke here) so they had to special order one from Riddell. In addition to the cheap plastic foam pads in most helmets, this one had a water-filled pad on the forehead and the back of the head.
I think I was in 10th grade. I broke through on a punt and ran right over the punter, who was also the star WR for the other team, and their best athlete. It was my facemask and forehead on his head, straight on. The ball bounced right into my buddy Dan's hands and he scored on the play, but I did not know this because both the punter and I were unconscious. I woke up on my back, wondering why no one was cheering my great play. The punters helmet had slashed his forehead, so in addition to being out cold, he was pouring blood from a pretty serious gash. Everyone but one of our coaches was gathered around him. I could feel this warm fluid on my face and thought I was bleeding, but when I touched my face and looked at my hand there was nothing. The world seemed strange...a long ways away.
The WR was out for stitches. I missed two or three series, then went back in, but not before I discovered that my facemask was broken. My head hurt and my vision was a little cloudy, and when I saw the film the next week there were a lot of plays in the 4th quarter I did not recall being involved in, though there I was, up on the screen. Anyway, we found out at practice on Monday that my helmet's water pad in the front was busted.
Every time I read one of these stories I think about that play. Except for those few series, I never missed a snap because of that injury.