[Crystof]

He's all right, the doctors just found a 10cm hole in his elbow, full of rocks and infected.

[John Doenut]

Riding with shorts and T shirt!!! I hope it fucking stings like hell.

Learn to ride correctly,you moron.

[NoelPuppet]

This is a classic decreasing radius turn, a bit of a challenge for new riders. Normally, when you assess a turn, you scrub off speed, counter steer to flick the start of the turn, then set the appropriate lean angle for the radius of the turn. Once you pass the apex you accelerate out of it and straighten the bike. With a decreasing radius turn however, the rider has a problem: as the radius decreases the speed and angle originally set are insufficient and you end up understeering. This is even more apt to happen for turns that are not cambered/banked, like this one.

While this is always challenging, your friend made things worse. At the 23 second mark he gave a quick acceleration even though he could not see around the turn. He entered too fast. Worse still, at 32 seconds he blipped the throttle again when it was clear that it WAS a decreasing radius turn. At that point he was screwed and he overshot. He didn't have a chance.

Three things to tell your friend:
1) If you cannot see around the turn, assume it is a decreasing radius turn and adjust speed accordingly.
2) Have a more gradual hand on the throttle. He is really jerky with his acceleration. Bikes don't like that.
3) If you ride, please dress accordingly. Guys who ride with shorts, tshirts, and flip-flops not only look ridiculous they support the belief that riders are idiots.