I was on a sharp corner photographing the the criterion at the men's National Masters Road Championship, and heard a bike go down behind me. I just turned and kept shooting. This is what I saw, and those guys are the top riders. Talking to one of the riders that went down, he said that it was the previous year's winner who caused the crash.
Knowing how to fall is a good skill. Notice how the rider keeps his hands on the bars as he goes down..