Life Ryan Reynolds, Rob McElhenney got colonoscopies after a bet. What to know about the procedure September 14, 2022 Marina Pitofsky, USA TODAY Comments Off on Ryan Reynolds, Rob McElhenney got colonoscopies after a bet. What to know about the procedure Ryan Reynolds said doctors discovered a polyp during a colonoscopy he had after losing a bet. What is a colonoscopy? How does it help fight cancer?