Ryanair's Michael O'Leary knows how to raise a giggle.
You could almost see the members and chair of the UK parliamentary transport committee hearing this week squirm with equal measures of both delightful anticipation and anxiousness as he entered the room late in the afternoon.
Questioned about the UK's transport policy, he naturally enough (what else would O'Leary do?) lambasted what he saw as dithering over plans for additional runway capacity in the south east, home to Heathrow, Gatwick and Stansted.
He noted how in the north east – in cities such as Manchester and Liverpool – things were going quite well for Ryanair.
Corrected by committee members that the two airports are in the north west, O'Leary self-depreciatingly replied that he's Irish, so his geography is all over the place.
But even as the Ryanair boss entertained the gathering, there's a lesson to be learned.
The committee members' questioning was largely brief and focused – very unlike the normal round of blathering that is often a feature of Oireachtas committee hearings, where members frequently launch into five minutes' worth of long-winded spiel disguised as questioning.
All in all, a grand day out in London. And O'Leary didn't even swear.