She's walking around with loose sweats. Her boobs are hanging out in the fromt, and her butt crack hanging out in the back. Who wouldn't look at that and get distracted? lol... 8)
Anyhow. If u watch this video u can also see that another bicyclist was obstructing the entry point of the turn. So instead of entering the turn wide- ie outside in- the biker was forced to take a narrower line by entering from the middle of the road. That coupled with excessive speed and a decreasing radius turn- he was simply going too fast for safety.
http://youtu.be/Av5nQba0I3o