a few years back, one of our nephews managed to light himself on fire while playing with his gocart, seems he had gas on his shirt when the engine backfired and it lit him up.
his friends rolled him around then stuck him in the shower under cold running water until the rescue got to him.
the flew him out.
he had burned his lungs and had to have oxygen to breath, they kept him in a drug induced coma for over a week just so he would not feel what he had done.
for the next couple months, a nurse would come to the house and sand, yes sand the burns that were all over him..
he is totally recovered from that with no noticeable scarring.
kids are tough.