Claudio Vieira de Oliveira is unlike any other person you've ever seen.

The 37-year-old Brazilian man has a condition in which his head is upside down that is featured on TLC UK's 'Body Bizarre.'

He was born with "an extreme case of congenital malformation," which no one can figure out why it happened. Basically, his vertebrae twists so much that it causes his head to go backwards.

De Oliviera has defied the odds. Doctors initially said he wouldn't live 24 hours. He outlived that expectation and went on to become an accountant and a motivational speaker.

You can see more of de Oliviera in the video below, as well.