About ten days ago I was riding my bike to work and saw a spectacular biker-doggie wreck on a beautiful, busy morning on Northern Virginia's W&OD multi-use trail. Fortunately, I don't believe any life threatening injuries occurred to man or beast. The W&OD asphalt bike trail has a line down the middle. A guy passed me on a slight downhill moving fairly fast in the Eastbound direction and then about 40 yards in front of me came upon a lady walking two dogs in the Westbound lane and another lady walking one dog in the same direction as us. He rightfully steered between the two dog walkers, but just then the single dog darted across the trail to sniff the pair of dogs on the other side. The biker nailed the dog and got caught up in its leash.
Pandemonium. The dog barrel rolled off the trail and ran howling past me into the brush. The biker and his bike did a complete flip in the air and landed in the middle of the trail. I was the first rider to arrive on the scene. Somewhat similar to the Gilbert scenario in this thread, the guy was screaming mad and made loud guttural noises as he laid on the ground. I took that to be a positive since it meant he was alive and conscious. After a few minutes I helped him up on his feet. He was in a bit of shock and trembling. Said his shoulder had momentarily dislocated, but popped back in. He was holding his wrist and it might have been sprained. He had a lot of abrasions on legs, arm, and face. The dog was caught and returned to embarrassed owner. She apologized profusely. The biker calmed down and got more civil. I picked up his bike and laid it out of the way. It was light as a feather and seemed to be in one piece. He refused further help and I went on my way. I wasn't sure he was fit to ride, but other folks were still talking to him when I left. I rode with an especially cautious, defensive attitude the rest of the way to work that day.
This collision occurred only about two miles from a fatal biker-pedestrian crash a couple months ago on the same trail when a biker called out "passing" to an older lady walking in his same direction. Instead of staying where she was, she got startled, stepped into the middle of the trail and turned to look at the biker. He nailed her head-on. It was ruled as a no-fault accident. The biker was ok.