Blake Shelton teaches Jimmy Fallon to milk a cow

‘You think this a game?

This is serious,’ says Shelton

Jimmy Fallon madeBlake Shelton try sushiback in May.

Now the country music star is getting some payback.

Credit: Andrew Lipovsky/NBC

Fallon showed up dressed in denim overalls and a cowboy hat.

Shelton critiqued the disrespectful look, telling Fallon he looked like Howdy Doody and Woody fromToy Story.

You think this is a game?

You think this a game?

This is serious, Shelton scolds Fallon, but neither could keep it together for long without chuckling.

Fallon struggled to keep a straight face, making his technique suffer as Shelton offered support.

Its more a squeeze-push than it is a stroke, he said.

But its not long before Shelton took over to show Fallon how its done.

Watch the hilarious video below.