Stroke is the number four killer in the United States behind heart disease, cancer, and emphysema. Stroke can be prevented by good diet, regular doctor visits, watching your cholesterol and being compliant with your blood pressure medication. Despite these measures stroke can still happen. Of course it's when we least expect it and always the most inconvenient time - middle of the game or the quilting bee is over at your house. Here's some signs of stroke to watch for and immediately call 911. There's a 3 hour window from the time of onset of these symptoms and successfully recuperating by way of thrombolytics - or drug therapy - and getting back your functionality.