Quite correct, just don't stomp the fire out when you're done with it. :-)
It also has some unadvertised hallucinogenic properties if taken internally. Got that from a Nam Ranger, who saw a papasan wolf some down. He was barking at the moon and talking to his dead ancestors when they whistled up a medevac for him.
In case if anyone is tempted to try this, I wouldn't. I believe it (I've heard of people huffing formalin, too), but formaldehyde (which is what the stuff breaks down to in the body) is nasty stuff. There's a reason people use it to preserve cadavers.