To an extent where it's not even debatable that a person saved your life... Debatable would be = Your girl or someone tells you something like: "Don't go out with your boys tonight, I have a bad feeling", so you stay home, and the car you were supposed to be in ends up in a bad accident. I'm talking about someone took a bullet for you, ran and grabbed you by the back of your shirt when you were about to walk onto an oncoming speeding car,or something like that... How would you repay them? Would you be like "Anytime you ever need a (non-sexual ) favor, I got you..." ? Or just say thanks and keep it moving? What if that person needed a body organ (like a liver) so they can live a few years later and they asked you for it? Would you help them? Would you feel obligated to help them? Would you deny them life even though, they saved yours?