Peyton Manning on his neck surgeries rehab -- and how he almost didn't make it back

At first, when Peyton Manning woke up from the anesthesia, he was relieved: The pain in the neck that he had lived with for years was gone. As he came to, he stirred in the hospital bed, took stock of his misery-free condition, and started to push himself upright. Then it happened -- his right arm buckled beneath him. Surprised, he struggled again to sit up, and at that moment, he understood his career was in jeopardy.