Yesterday, I took a fall at a local park. I was running on a trail that parallels a road. I tripped on a mostly buried rock. It took me down hard. I opened up my right elbow and right knee. After making the "nuggh" sound as i hit the ground, I rolled off my back, got up and got back to running while I tried to evaluate my condition. I took looks at the places that hurt, and saw some blood on both places. They pained me into the night, and my knee felt stiff yesterday, but all was fine today - I should be healed in about 10 days. Still, it was a bit frightening.