From what I’ve read on 6speedonline, the winds at the last even in October were almost deadly. One of the Porsche’s sunroof caved in or something of that nature just from the air pressure difference between the car doing 180+ and the wind. People were complaining how much they were drifting and swaying down the track. I’d guess that some debris crossed one or two of the markers. Either way, the car was doing at least 180mph which is still moving.