Ever raced on Runway (vids)???

Wow, pretty cool!
No helmet on the 409 Chevy guy. Makes me wonder, in this litigious day and age, how an event like that can happen.
Don't get me wrong, I love it. Just wondering how it can happen without a tech-in, etc? Is there a release that has to be signed by drivers and spectators? If parts fly into the crowd...
There's an airport near me. Unfortunately, it's open. It'd be great to have a place to just let loose.