There was a discussion of the 10 second limit to get out of the car with the Halo. Guess they did not think about a driver who was either knocked out or stunned for a moment. The impact was such a major impact for the brain that the driver was at lease stunned and then he had to deal with the fire. GREAT that he got out so quickly. GREAT for the Halo!
https://www.motorsport.com/f1/news/what-aftermath-photos-reveal-about-grosjean-escape/4918717/?ic_source=home-page-widget&ic_medium=widget&ic_campaign=widget-1
Thank God for the Halo, I do not want to even mention what would of happened without the Halo.