Watched that race live, that was a big hit. I'm more worried about the crew member that got hit by a stray spring.
Anyway, these cars are very very safe. The cars are designed to absolutely disintegrate to dissipate as much energy as possible, which makes them look unsafe, but they're not. Vickers one last week was a complete fluke, the car was caught at an angle that it would never get caught at in a proper wreck, and I'm sure it wouldn't happen again now it's happened once.