A large and very loud American goes into a pub in Glasgow.

"I hear tell all you Scatch people are real hard drinkers." he says in a big booming voice, "Now you folks just don't know what hard drinking is! Why I'll wager a bet with any man to drink 20 shots of whisky one after the other and give you $500 dollars if you can do it."

No-one takes up the challenge. One bloke even leaves!

"Well, there ya go, sure proves my point!" the American says disgustedly. A few minutes later the guy who left comes in and says "Hey Big Man, is that bet still on?"

"Sure as hell is!" and he orders a line up of 20 glasses of whisky. The man runs along the bar, grabbing each glass and throwing back the contents, to huge cheers and the astonishment of the American. The American of course tries to do it as well, but can't pass the 17th, so he gives the bloke the $500.

"Tell me," slurs the Yank, "where did you go before you (hic!) came back in again."

"Eh? oh aye" says the man pocketing the bills,

"I went tae another pub just tae make sure Ah could dae it!"