If you could take a sword through the torso without a problem, you'd probably feel pretty invincible right? Well, so did Mirin Dajo - and that's what killed him.
"Arnold Gerrit Henskes (6 August 1912 – 26 May 1948), known by the pseudonym Mirin Dajo, was a Dutch performer. He became famous for radically piercing his body with all kinds of objects apparently without injury, even surprising the medical community at the time."
More on Wikipedia:
https://en.wikipedia.org/wiki/Mirin_Dajo