Michael J. Fox also known as Marty McFly himself rose to prominence during the Back to the Future trilogy. Afterward, Fox went on to become a mega-star in the celebrity community and was also known for his roles on sitcoms like Spin City and Family Ties. Unfortunately, at the tender age of 29-years-old Michael J. Fox was diagnosed with Parkinson's Disease and announced his retirement from acting in the year 2000 after his symptoms worsened.
What many don't know is that Fox almost lost his life after a stunt went wrong while filming the third Back to the Future film. Fox had accidentally misplaced his hands and ended up hanging from a noose rendering himself unconscious. No one had noticed that he wasn't acting until he passed out. Luckily, he was resuscitated and has become an advocate for Parkinson's Disease.