Not a clue to be honest. My experience is all from turning up to deal with cars that are already well involved.

Only thing I will say is that Hollywood car explosions are a myth. Fuel tanks will flare off, but don’t actually explode(with the exception of LPG in rare circumstances where the pressure relief fails). Tyres do explode, but aren’t a major hazard unless you’re within a metre or two of them when they do.