Once upon a time in another life, I was on a Honda 450 coming down the narrow road on Big Bear Mountain in California when out of the clear blue, a guy on a highly modified bicycle passed me at 100+ MPH. He had chopped the frame down where he essentially was laying down on the bike. Think "luge" and you'll get the idea. The front axle was extended out about eight inches on either side and acted as the handle bars he used for steering. The rear axle was extended out like the front axle approx eight inches and was where he placed his feet. The tire diameter looked to be approx 20 inches. HE WAS FLYING!! If his tires had developed a blow out or a slow moving vehicle had gotten in his way he would have gone straight off the side of Big Bear Mountain and plunged one thousand feet straight down. Only in California.