While the condition explored here may seem rare and exotic, the reason behind it is more common than you think. Join Dr. Oz on an exploration of an extreme medical oddity. Footage courtest of TLC's "My Shocking Story 3: Half Man Half Tree."

To view the story of Octopus Man, click here.

Animation produced by Visible Productions Inc.

Whether it's falling or flying, Dr. Oz has the answers to why you have the dreams that you do and what they might mean.