 is another minute that your brain is being starved of oxygen. The warning signs of a stroke include sudden numbness or weakness of the face, arm or leg, sudden trouble seeing, speaking or understanding. If you experience any of these warning signs, call 911 immediately. Because time lost is brain lost. Visit strokeassociation.org or call 1-888-4-STROKE today. A public service announcement from the American Stroke Association and the Ad Council.