An American, an Englishman, and an Irishman walk into a bar... (credit goes to my buddy Rob from university)

.. they each order a pint of beer. The american finds a fly in his, and yells out so the whole bar hears, "This is disgusting, I'm outta here!" and storms out of the bar.

The Enlishman also finds a fly in his beer, but he politely asks the barkeep for another beer, if it's not too much trouble.

The Irishman.. he also finds a fly drowning in his beer (seriously? yeah seriously. It's a filthy bar). He picks it up by the wing, holds it over the glass and yells "Spit it oot!"