Danica was driving an Indy car in the Indy 500 yesterday. Although Indy and Formula 1 cars are both open-wheeled, that's about as far as the silmilarities go. It was IndyCar where Danica originally made her name, before she switched to NASCAR. I don't follow IndyCar, but the commentators mentioned that the cars had lower downforce than previously at this year's race, and most of the crashes were cars spinning while following in the "dirty" air of other cars.