Dario Franchitti, Takuma Sato, and EJ Viso had a big accident today on the final lap of the Houston GP IndyCar race. It takes several views to see everything that happens in such a short period of time.
1) Sato's big oversteer in the fastest sweeper
2) Dario's attempt to avoid Sato, then a violent flight into the fence
3) EJ Viso gets past Dario, but hits Sato hard
4) One of Dario's wheels is punted by another fast passing car, the wheel flies like a missile into the walkover bridge and is deflected over the catch fence
5) A section of catch fence hit by Dario lands in the grandstands filled with spectators.
Not sure any further detail, but I hear Dario is okay. Don't know about the fans.