Most of the DNF I saw were people coming out of the first sweeper to the left. They were going outside of the gate on the exit of the turn. There was a pointer cone on the inside and a single cone on the outside. You had to get your head around early to spot the pointer cone. At least one car missed that gate 4 times.
The second to last turn before the finish had a few people get in that turn too hot and just not make the gate.