This is what you do when you're on
FIRE. First of all, stop running around, 'cause you'll set the
curtains on fire. Next, drop. This means hit the ground,
soldier. Now roll. If you're lying on a
flammable material, try to roll off of it. If all goes well, you'll stop
burning, and go on to live a long, happy life.
They try to
pound this into your head when you're
little, hoping that if you actually do catch on fire, you'll remember it instead of thinking "
Holy shit, I'm on fire!"