Why Are Jamaicans so Fast?

Why do three of the four fastest men on the planet come from Jamaica? Is it the yams? Bananas? Rich soil? Or could it be something else? Support me on Patreon and pledge as little as $1 per video: http://patreon.com/user?u=3517018 Facebook: http://fb.me/thethenandnow Instagram: https://www.instagram.com/thethenandnow/ Twitter: https://twitter.com/lewlewwaller