After seeing a teen picked up from the ground (thankfully unscathed) after coming off his moped this morning, I started wandering about this. My friend is a biker, and told me that when you take bike lessons, you are advised to wear protective clothing, but it's not a legal requirement. I see these youngsters whizzing round wearing shorts and teeshirts, or jeans, and they have no protection at all. Apparently, you lose 1mm of flesh for every foot you slide when you hit the floor in a skid!