Anderson Cooper. (Evan Agostini/AP)

Yes, the intrepid journalist was doing fine explaining the post-Lent, Polish-American holiday — he placed anyone who missed it on his “Ridiculist” — until he got to the following sentence, which was uttered in a voiceover:

“The quirky little ritual includes boys sprinkling girls that they fancy with water, and the girls striking back with a tap from a pussy willow branch.”

That’s right: he didn’t even have to say the words. Yet, the giggles flowed.

“I’m not gonna let you do this,” Cooper said as he walked away from his desk, choking back the laughter. “It’s really so stupid.”

The moment was reminiscent of the laugh attack Cooper suffered in August while reporting on Gerard Depardieu’s unfortunate airplane urination incident.

Following that segment’s viral rise to fame, Cooper explained his unique titter to Entertainment Weekly: “I’ve always giggled like a 13 year-old girl at a Justin Bieber meet and greet. There’s nothing I can do about it but I’ve never not been able to stop.”

Which is good news for the rest of us.

But wait — what’s this? Not everyone is charmed by the Dyngus Day giggle fit of 2012?

Cooper tweeted, “Just learned some groups believe I called Dyngus Day ‘so stupid’ in ridiculist. I didn't. I was saying my giggling fit was ‘so stupid.’”

Indeed, the CNN video was titled “Anderson cracks up over ‘stupid’ story,” which certainly seems to imply that the day is dumb. Update: It has since been changed to “Anderson cracks up over holiday script.”

He apologized for the confusion via Twitter: “Genuinely sorry if I offended anyone.”

Watch the segment below.