If a casualty's clothing catches fire during a vehicle blaze, what is the correct action to extinguish the flames on their body?

1. Instruct the person to run as fast as possible to create wind to blow out the fire
2. Have the person stop, drop to the ground, and roll slowly, or smother the flames with a thick non-flammable coat, blanket, or water (就地打滚或用厚衣服覆盖灭火)
3. Hit the burning person with a plastic broom
4. Spray the casualty's face directly with high-pressure toxic dry chemical extinguisher