What is the most effective method for putting out a person's burning clothing?

Using a fire blanket is the most effective method for putting out a person's burning clothing because it works by smothering the flames. A fire blanket is typically made of a fire-retardant material that can quickly wrap around the person, cutting off the oxygen supply that the flames need to continue burning. This method is particularly effective because it envelops the fire directly and reduces the risk of the flames spreading while protecting the individual from further injury.

In contrast, while water can be effective for extinguishing fires, it may not be the best choice for burning clothing on a person, as the sudden application of water can sometimes exacerbate the situation or cause the flames to spread. A chemical extinguisher is useful for certain types of fires, but it can also be hazardous in close quarters with a person burning. A heavy coat might smother the flames to some extent, but it's not designed for this purpose and may not effectively extinguish the fire as quickly or safely as a fire blanket.