The whole marketing campaign for the Heart Attack Grill in Vegas centers around its name. You can order Flatline Fries and a Butterfat Milkshake to go with your Quadruple By-pass Burger. Patrons that weigh more than 350 pounds eat for free. Well, yesterday a guy went in and started chowing down on a Triple By-pass Burger when . . . wait for it . . . he had a heart attack. Really.