Before revision: 2011 "Quantifying collective effervescence: Heart-rate dynamics at a fire-walking ritual",Communicative & Integrative Biology 4(6): 735-738 Explanation When two bodies of different temperatures meet, the hotter body will cool off, and the cooler body will heat up, until they are separated or until they meet at a temperature in between.
After revision: 2011 "Quantifying collective effervescence: Heart-rate dynamics at a fire-walking ritual",Communicative & Integrative Biology 4(6): 735-738 Explanation Per the second law of thermodynamics, when two bodies of different temperatures meet, the hotter body will cool off, and the cooler body will heat up, until they are separated or until they meet at a temperature in between.