The you-tuber Hell'n'Black show us he can turn off the flame of a torch with his tongue. Very well, this is a oxyacetylene torch, it can produce a flame who can reach 6332 degrees Fahrenheit, and this is enough for cutting steel. He explains this is not a fake, but I don't believe him... Even if you are faster enough the flame will burn you immediately this is physical, I think he has a special product on his tongue. What do you think about that ?