The Fly in the Beer

An Englishman, a Scotsman, and an Irishman walk into a bar...

...and they each order a pint. The Englishman gets his beer, looks at it, and sees a fly in it. He immediately pushes the drink aside and demands a fresh pint. The Scotsman gets his drink, and there's a fly in his. He calmly picks the fly out, flicks it aside, and enjoys his drink. Finally, the Irishman gets his drink, and there's a fly in his too. He pulls it out, holds it by the wings, and screams, "Spit it out! Spit it out, you thief!"