There is a finnish travel show Madventures. Where they took part in this march. I had seen many documents about it, but was kind of lame to notice that instead of brutal whipping action where blood is spilled, they actually did tiny cuts to surface of skin with glass, and it creates these microscopic wounds which will bleed pretty well, but be pretty harmless. It looks more brutal than it is.
Of course, being nailed on crucifix, that was more brutal. As are some of the heavier rituals with piercings and hook suspension what will simply do some serious damage.
