 Time to call 911 immediately. Know the sudden signs. Spot a stroke fast. Visit strokeassociation.org. Brought to you by the American Stroke Association and the Ed Council. When Marlon Shirley was five, he lost his foot. Today, as the world's fastest amputee, he runs the 100 meters in less time than it takes to listen to this. Overcome. Pass it on. From the Foundation for a Better Life.