This is a satanic cult of evil.
You must COEXIST you Philistine, you. That’s what the bumper stickers demand!
Actually the whole walking over coals, provided done properly is more of a parlor trick than any sort of risk. As long as the ash is distributed properly on top, you have little risk of actually burning yourself by walking over them.
Smacking your forehead with blades, well that’s just macabre