Atheists, the scenario is you have a week to live.

What is keeping you from engaging in your baser instincts: Raping, pillaging, stealing and all those sorts of things? What's stopping you? I mean, you can get away with anything you want, so why not?

This is a different from asking you this if you had thirty years to live, I think. You don't have the risk of spending thirty years in prison for murder. A life sentence might only be a couple of days! Besides, it'll never have enough time to go to trial.