A fire extinguisher is used when there is a fire in the lab. We use the fire blanket to put out the fire on a person (STOP, DROP, ROLL)

Professor Jones: ‘Correct! STOP moving, DROP on the ground and ROLL over back and forth on the fire blanket until the fire is out.’

From:https://www.wikihow.com/Use-a-Fire-Blanket#/Image:Use-a-Fire-Blanket-Step-8-Version-5.jpg