Death can be a calculated thing. So calculated, in fact, that it can end with life.
Having a plan for death prolongs it from happening. You see, if you go over that edge and want to jump out of the moving car, you might be stopped if you already have your death plan in place. Instead of ending your life with a face that was rubbed around the cement and a body that had to be hosed away by the fire truck, you could instead be assured a peaceful (or violent) death with body intact. If you have a plan.
The more important thing, though, is that when you know you've been balancing on the edge that valley for a long time and that you could be pushed over with the touch of a finger, a plan can in fact save your life instead of end it. It's almost like insurance. May sound crazy to some people, but perfectly sane to the sufferer. If you want to die anyway, you may as well wait to run your plan instead of act on a whim. See?
A plan buys time, and time buys change. That's why a death plan is good when you're on the edge; you then have the option to die the way you want to, which will take time to put into place and follow through with when you have been pushed over that edge. Instead of jumping out of the moving car, you will wait to get home and get everything ready. By the time that happens, life, your emotions, and surrounding events can change. It buys you time, and in some cases, time equals life.
No one wants to die, until you want to die. Calculated death...may just be the solution to ending your day alive.