Let's start with a proposition: What are the chances of your being able to back up and rerun an event that has just happened to you? Let us just suppose for a moment that you could do just that and, in the process, make one small change to what had happened. Would you relive the experience a second time, or even a third? That is the premise of the stories you are about to read. An event, with potential dire consequences, is experienced by you—in real time. For good or bad, if you had the opportunity to repeat it, making one small change, would you choose to do so? Would you do it again? Take the challenge of a relifetime, and see what could happen, if you dare.