1 How does it work?
2 Why use it as a metaphor?
3 Is it a con?
1 State of Mind, Focus, Belief, Physiology and...Physics.
2 Its dangerous and if you do it you will believe you can achieve anything..
...In that order!
This is a TV Firewalk event for a show called Date My Mate...Boy were they surprised at 'the date'!! ;-)