What if someone came to you ten years ago and said this: "I have a great idea for movie. Let's have this guy contract cancer and almost die. Then let's have him fully recover and win the Tour De France seven times (although no one has ever won it more than five times). And then, to spice it up, let's have him leave his wife and hook up with a rock star. And, let's add this for good measure: Let's make him a Texan and give him a great last name like 'Armstrong'".
No one would have believed it.