Yep, id rather be standing on the grass looking back at the Aircraft wondering what just happened than sitting in it whilst it burns........
Option 1/ definitely get out in one piece NOW and find there is no fire later on....... Oh well
Or 2/ stay in the Aircraft with 250+ other people hoping it is a false alarm and not a real threat........AND POSSIBLY DIE.
IF THERE IS DOUBT THEN THERE IS NO DOUBT....