I was driving and someone went off the track I can't remember if their car recrossed the track, the the next lap round i'm sure I felt the car sliding, this happened for a few laps then it was ok again, is this normal driver perception playing on my mind or have you added it to the model, that cars car drop oil or other liquids, either due to a crash or by other means, like mechanical failure. If so will we get flags to tell us, assuming a marshal could see the liquid.
