ARFF- No disrespect to you guys and girls, but I think by the time we had contact with you and you were near enough to see anything, our decision to evacuate would have been long taken. If we are still there when you arrive, anything you can tell us. Certainly any signs of fire.
LEM - certainly no delay - there is NO point in waiting. In the air, it is wise not to fire a bottle unless you need to, hence the pause to see if the first one works.