Interesting thread. I was at my local bike Saturday. I guy came into the shop with his kid who was holding the rear wheel from his new Trek mountain bike. His Dad followed with the rest of the bike. Im sure the guy hadn't yet mucked with the bike since he bought it as he had no idea how to slide the wheel back into the drop out. His front tooth was broken and the back of his arm looked like a butchered red velvet cake. The bike manager slid the rear wheel back in and tightened the quick release but his brake rotor was taco'd.