This reminds me of a bike accident I was in about 3 years ago. I was racing home from work on my mountain bike, jumping up and down curbs, taking sharp corners, etc. After jumping over a flower bed to cut through a parking lot I lost control of the handle bar and the bike started veering to one side then the other (I was going so fast it took a few seconds to crash). Man, what a spill! I hit the pavement hard and tumbled for about 8 feet, disoriented. When I came to I realized my right leg and right hand were skinned and covered in blood, and I had an incredible headache. It occurred to me that I had slammed my head onto the pavement, as I was having a problem regaining my ability to balance the world in my vision. Luckily, I had been wearing my Oakley Straightjacket sunglasses which had taken the brunt of the force to my head during the fall--sort of like a helmet. Apparently I came down directly on my eyesocket/cheekbone and the polymer frame of the Oakleys, which is very thick, had protected me. My cheekbone was so sore for days after and the fall left me with permanent scars on my legs and hands. Unlike the OP's watch, however, my Oakleys were destroyed. I've since replaced them with Monster Dogs!