The traffic after the race is unreal so to beat it they used the helicopter. One person suffered a broken jar. Rumor was a piece of brake rotor hit them!
Restrictor plate racing is intense, your going 190 on an engine with 400 horsepower that without the plate would be 800+. Without the plate speeds would exceed 220 MPH if not more and a little touch will send that car into barrel rolls if not into the air.
The biggest fear is if a car was to barrel roll or get sideways such as Carl did, get touched by another car and toss over the fence. It could happen.