I've always been fascinated by (or scared of) the concepts of those moments before you die. What must it feel like being led up to the electric chair, or held at gunpoint? What would your thoughts be, knowing you'd soon stop existing (or go wherever you believe dead people go)?

I imagine a city where every day one person is selected at random who will die in 24 hours and is told so. (I got this particular idea from another story, but lots of story ideas are fundamentally the same.)