yeap. confirmed then. theyre not saying it’s the air around the hand, but the nitrogen gas that forms on contact.
i dont know. id question this blah blah leidenfrost effect as the reason given for being able to do that safely. cum hoc ergo propter hoc, or something. i say you could probably touch some supercooled metal at the same temperature for the same amount of time, assuming you dont have wet hands and get stuck to it.