Jeb and Blake whip out the marshmallows and settle down by a big hot fire to discuss the In Search Of episode: Firewalkers.  (watch this ISO episode on YouTube)

From Wikipedia (on heat transfer): Advection Advection is the transport mechanism of a fluid from one location to another, and is dependent on motion and momentum of that fluid. Convection The transfer of energy between an object and its environment, due to fluid motion. The average temperature is a reference for evaluating properties related to convective heat transfer. Radiation The transfer of energy by the emission of electromagnetic radiation. Conduction  The transfer of energy between objects that are in physical contact. Thermal conductivity is the property of a material to conduct heat and evaluated primarily in terms of Fourier's Law for heat conduction.

The guy who trained Tony Robbins - Tolly Burkan used to train people to TEACH firewalking for just a mere $2000. 

Tolly said he learned about this from August 1977 Scientific American.

Expedition Magazine mentioned by Jeb.

Harry Price (famous Ghost Hunter) researched firewalking.

The Skeptic's Dictionary lengthy entry on Firewalking

More on the physics of Firewalking 

2 Kings 17, v 16-17 (Bible verse discussed) And they left all the commandments of the LORD their God, and made them molten images, even two calves, and made a grove, and worshipped all the host of heaven, and served Baal. And they caused their sons and their daughters to pass through the fire, and used divination and enchantments, and sold themselves to do evil in the sight of the LORD, to provoke him to anger.

The symbolism filled story of Shadrach, Meschach, and Abednego 

Sydney Walter - hypnotist

The Spanish fire walking of San Pedro Manrique 

I did notice (on rewatching) that not all couples crossing were heterogeneous, nor were they all young.  

The magician Chung Ling Soo, mentioned by Jeb, who died on stage with a botched bullet catch.

Nimoy reminds us of The Police video for Wrapped Around Your Finger as he plays with candle fire.

The Balinese shaman may be invoking the spirit of the Bali Pony, the local breed.

 

Arthur C. Clarke's World of Strange Powers (Firewalking) 

 

  1973_newswire_story_about_firewalking_in_Sri_Lanka__Ceylon__.pdf Firewalkers_TV_Listing_04_JUN_1978.pdf