When the gym quiets down like that it's an eerie thing.
Last week, During a pressing situation, A1 jumps to receive a pass, B1 cuts him. I blow the whistle, 10ft from the action, A1 lands flat on his back with the loudest thud I've ever heard. I immediately call the coach out, dead quite in the gym and A1 yells out "I can't feel my legs."
I got the worst feeling in the pit of my stomach. The coach told him to stay calm and don't try to move. Luckily, after about 10 mins, the EMS came in and they asked him how he was, A1 moved his legs and actually walked off the floor under his own power. It turns out he landed in a way that would resemble a "stinger" in football. Very scary.