Here's an unexpected motorcycle crash, from LiveLeak.com:
"How to crash a Yamaha FJR 1300"
The comments after the article provide some better explanation of what happened. Thankfully the rider was okay.
That was a bike review for the french magazine "Moto-journal":
http://www.moto-journal.tv/la-webtv-venue-dailleurs/lolo-tombe-dans-le-port-de-saint-martin-en-re-en-yamaha-fjr-1300
The bike tester, lolo, is fine (few bruises and one dislocated thumb) and even comments his own crash.
That is why the incident is recorded with such a good quality.