My proposal is this: A helmet with a sensor that detects the continuity in your spinal cord and the severity of any impact, and in the event of an impact which would surely leave you a vegetable, and sharp blades quickly come down around your neck, make a quick sharp cut, and then a spring-loaded lever helps pop your head completely off (for dramatic effect). The result: a quick, painless death (and an amazing show for any bystanders). Think of the money you and your family would save from having you lying in a hospital bed for years. Although this seems traumatic for your loved ones, think of the alternative. And wouldn't you rather be remembered for a dramatic, bizarre death such as this than a slow, painful (for yourself or your family) death.