Burger King enlisted yodeling cowpoke Mason Ramsey, 13, to help spread the word about its plan to reduce cow flatulence. We ain’t pulling your leg—or finger—on this one.

Burger King is selling Whopper patties sourced from cows fed a diet designed to lower methane emissions. Burger King worked with scientists by adding a small amount of lemongrass to a cow’s diet, which cut the bovine’s methane emissions by 33 percent during the last three or four months of the cow’s life, according to preliminary tests.

Burger King will be offering Reduced Methane Emissions Beef Whopper sandwiches at select restaurant in Miami, New York, Austin, Portland and Los Angeles.

In a new two-minute clip, Mason sings about the perils of methane, including the opening line, “When cows fart and burp and splatter, well, it ain’t no laughing matter.”

Of course, we would be remiss not to mention the gold standard for all Burger King ad campaigns: 2005’s Tender Crisp Bacon Cheddar Ranch sandwich, which starred soon-to-be country star Darius Rucker of Hootie and the Blowfish fame.

Check out Mason’s new video below.