( Ordinarily, as an Irishman I dislike most jokes about Irish drinking. This one I liked)

An Irishman is driving somewhat erratically down the highway. A Garda (police) pulls him over.

The officer explains that he is driving somewhat erratically. The Irishman explains:

" I was at "Happy Hour" at the pub. It is Friday night, after all. I had about 5 or 6 Guinesses. Then I had to drive Mike home. He had me in and I had a few sips of Bushmill's. It would have been discourteous to refuse. Come to think of it, it could have been more than a few sips. Then, I stopped to pick up just a pint of Bushmill's and checked to see that it was the same Bushmill's they put in the liter bottles. Ye never know what those people might do!"

The officer sighs and says: " I'll have to ask you to step out of the car and take a Breathalyzer test".

The Irishman says: " What? You don't believe me?"