DCist hears that Z-Burger will be handing out free hamburgers on days after the Dow Jones Industrial Average drops 500 points or more. Like today! The Dow tanked 519 points on Wednesday. Whee! Just say “Z-BEARger.” (Get it?) Don’t wait too long to take advantage of the offer: “as of 11:20 a.m., the Dow was up about 250 points … so the chances of a free burger tomorrow appear slim.”