Last week a friend of mine was riding his bike and took a corner too fast (est: 85-90) leaned over too far and lost the bike, and slid into a guardrail amputating both of his legs instantly, the two people he was riding with never even slowed down, luckily there was a woman in a car behind him and saw the whole thing unfold, he regained consciousness long enough to tell her who he was and then passed back out. they lost him in the ambulance and brought him back, the same thing happened at the hospital a second time and when it happened a third time there was nothing that they could do for him. He had not been riding too long, less than one month, and against all of his friends/family went ahead and bought a bike too big for his maturity level. His father bet him $10 that within one month of him having this bike he would be down and when the police/hospital returned his things to his father there was only $10 in his wallet. Please everyone be careful and don't overreach your skills/knowledge, ride safe everyone.