I fall down

Yesterday I was playing badminton with my high school friends. We played men double. After a while, I chased the shuttlecock right through the other court but my body couldn't control my balance and I fall down quite hard. It was really loud. Even the people who playing at the other court was mesmerized by my fall. A couple of second went by a silent. Not long until laugh broke almost everyone in that place. I was so embarrased. Until now, my knee is still hurt. I need a bandage.