Btw they should actually hold still in/above he flames and not move it about. I know I can reach through a candle flame without getting burnt but keeping it there...
Now the hair, like the dude's beard, it's a different story. I burnt the hair on my arm accidentally over the flames of the gas stove, fairly high above (they didn't caught on fire, just curled and roasted away). It was very quick, my skin did not got burnt.