This is good stuff
I heard the coals used in fire walking also have a low heating capacity, andthe our feet produces sweat which acts as a protective surface by forming water vapour.
Also, the seminar @njokueruchi is talking about I think is the one by Tony Robins "Unleashing the power within"
Find the report here
https://www.google.com.ng/amp/s/amp.livescience.com/21835-firewalking-hot-coals.html
RE: An Unburnt Soul (Fiction)