What if it's just a bad cold and you're not really dying. That could be a crushing anticlimactic moment as you trundle up the cul-de-sac to the snickers of your neighbors.
Oh, I figure it won't be a rash decision. If my health is a slow and gradual decline, hopefully I'll know when the time comes. My luck, though, I'll probably have a massive stroke that leaves me an invalid and unable to take "the walk." I suppose I romanticize the whole affair in my mind but it seems a lot nicer to think about than loosing my mind, pooping my pants, and being completely miserable and unable to care for myself.