Crashed

So today Jacee, Kaden, Ozzy, and I went to the park to go off jumps. I kept doing the same one over and over again until I got good at it but then finally I landed and put on the brakes while I was going fast and my tires slid and I fell off and skidded across the ground. In the picture there is a big red mark on my back from it. If you look at my back it has more red marks on it but they didn't show up on the camera.