[greglepore]

He and one other guy were off the front on the first descent of Lookout Mtn at high speed around a sharp turn, as they exited one of the race motos was rapidly slowing in front of them and wobbling across the road for an unknown reason. The other rider (Lucas Euser) rode into a concrete wall on one side of the moto, and skimmed along it, trashing his bike but mostly unhurt. Phinney hit the guardrail, compound fx tib/fib with apparently some unknown involvement of the knee.

Was a race vehicle to blame for Taylor Phinney's broken leg? - VeloNews.com