Face down on the turf and dizzy from impact with hands on backs and words of encouragement and reassurance that you probably just got the wind knocked out of you, that you'll probably be just fine.
Step up slowly and clutch stomach and wave off trainers and push through dull roars of boos and applause to find a metal bench and a warm towel in appropriate colors for wiping sweat from above eyebrows, in order to avoid obscuring precious vision.
It is hard to see sometimes where lines live on the field, which can make it near impossible to display adequate decision-making. Constantly presented with new situations. Time is of the essence.
It is hard to know when to let go of the ball and when to hang on and shove your way through the line like it's your job, like someone is depending on you. It is easy for some to move onto the next play like the last never happened, and to stay focused on the goal without dwelling on the day's past events.
But when you're catching your breath and laying on the artificial surface, pushed over by a force that seemed much greater than yourself, you run the events of the day over and over again in your head and wonder how you got here, and why you are grinning so wide.
You learn so much about yourself in the moments when you're helpless and mangled on the ground.