Seems more likely to be driver error. Apparently it wasn't their car and it happened at the end of the first lap.
Saturday was chaos! 30+ cars per session, overtaking on the left, overtaking on bends and I hardly saw any black flags! I even saw cars getting released from the pits into traffic
I wouldn't mind taking a car out on track one day but have been really put off doing it after seeing what people were getting away with on Saturday! I think it would have been a terrible day to go out on my first track session, especially seeing as I only want to do 1-2 sessions just to say I have tried it.