Can you put your hand into the molten metal and not burn yourself? Recently, there is a recording on the network, on which a man is doing something like that - he takes off his protective glove with a large metallurgical furnace, and then pass his hand through a stream of flowing, red-hot metal. How is it possible? This is explained by physics.
It is the same phenomenon that causes bubbles to appear in the boiling water. This is the Leidenfrost effect that a drop of liquid, falling on a heated substrate, does not evaporate at once - but it maintains a spherical shape for some time and makes rapid movements. This is due to the fact that on the surface of this drop creates a film of steam, which as a kind of pillow isolates water from the hot substrate (in the case of boiling water bubbles arise when this steam layer is rapidly falling apart).
Similarly, in the above case - the moisture in the man's hand first heats up by evaporating and creating a layer capable to protect his hand from extreme temperatures for a moment, when he pass his hand through a stream of heated metal. In the network you can find similar recordings with short contact with extremely low temperature - liquid nitrogen (which boils at a temperature of almost -200 degrees Celsius).
Well, physics explains it all, but I would not dare to do it myself.