People say WWE is fake. But it is kind of not. Yes the whole thing is planned on who wins and looses. But they still put their bodies on the line. Its not like the ring is made of bed or something like that. That ring is hard. Thats why it sounds like that. Sometimes accidents do happen.
Its not easy to do that 5 days a week in front of millions of people.
To the blood part :
The blood is completely REAL. Yes they dont get cut by a steel chair or the turn buckle doesnt make them bleed but it is real.
HOW?
Well right before someone bleeds watch carefully next time the refree will go close to the person who is about to bleed and make hand contact. Well in that contact he gives him a small razor not like the one we use to shave or dangerous one. Just a small tiny razor. Right before he is hit by the chair he cuts himself in the head without anyone seeing it and BAM! the chair is hitten and looks like he bled cause of that. That heals in 1 or 2 days only.
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It is not completely fake. Its a story made up but the bodies they put on the line are real.