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I'm also a First aider, and on a plus note, trained with 'in field emergency medical trauma'. So should be alright if Dreds shoots you in the eye with an arrow.
They need to let the air out the car, ie, when you shut the door, they will flap open. If it was the other way around, you would get the exhaust fumes in.
If you are really stuck, I can go and check on the race car for you.