It was a happy occasion Monday during President Obama's hasty visit to Ireland to see what is deemed his ancestral hometown of Moneygall and stop by Ollie Hayes' pub for a pint.

Yes, during all the official hoo-hah in Dublin the president's motorcade had a limo problem that paralyzed its movement briefly, driving the security folks crazy for a few minutes (See full video below) because a POTUS is not supposed to be exposed to unsecured public like those who videoed the accident.

Thousands had waited hours in Moneygall (Pop. 298) to see the Dunham descendant and Obama worked the crowd's perimeter several times. Obama is a beer fancier and has flown in some favorite Chicago brews at times. And remember when he tried to patch up that confrontation between a Cambridge cop and professor? That wasn't a Tea Summit.

Monday it's what happened inside the Moneygall pub that may not go down too smoothly with the American distributors of Ireland's world-famous Guinness.

The president got to reminiscing good-naturedly about a previous encounter with the tasty liquid.

"The first time I had Guinness," Obama said, "is when I came to the Shannon airport. We were flying into Afghanistan and so stopped in Shannon. It was the middle of the night. And I tried one of these and I realized it tastes so much better here than it does in the States."

Oops.

Then the commander-in-chief blithely added: "What I realized was, is that you guys are -- You’re keeping all the best stuff here!”

And now the video.

-- Andrew Malcolm

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Photo: Pool, Getty Images