10 Pints of Guinness

 A Texan walks into a pub in Ireland and clears his voice to the crowd of

 drinkers. He says, "I hear you Irish are a bunch of drinkin' mother
 fuckers. I'll give $500 American dollars to anybody in here who can
 drink 10 pints of Guinness back-to-back". The room is quiet and no one
 takes of the Texan's offer. One man even leaves. 30 minutes later the
 same gentleman who left shows back up and taps the Texan on the
 shoulder. "Is your bet still good?", asks the Irishman. The Texan says
 yes and asks the bartender to line up 10 pints of Guinness. Immediately
 the Irishman tears into all 10 of the pint glasses drinking them all
 back-to-back. The other pub patrons cheer as the Texan sits in
 amazement. The Texan gives the Irishman the $500 and says, "If ya don't
 mind me askin' where did you go for that 30 minutes you were gone?".
 The Irishman replies, "Oh...I had to go to the pub down the street to
 see if I could do it first"