Donald Trump appeared to be the topic of conversation for a group of grinning world leaders who were caught mocking the President at a Buckingham Palace reception.
Since the US President touched down on British soil on Tuesday morning he has dominated headlines, primarily by calling French leader Emmanuel Macron 'nasty'.
Several hours later he was the topic of conversation again when Macron, Boris Johnson, Canadian PM Justin Trudeau and Dutch leader Mark Rutte came together for a cosy chat.
Clearly unaware that they are being filmed, Johnson turns to his French counterpart and asks: "Is that why you were late?"
“He was late because he takes a 40-minute press conference at the top,” Trudeau answers for him.
After Macron, who has his back to the camera, says something beyond the microphone's reach, the Canadian PM adds: "You just watch his team's jaws drop to the floor."
Johnson does not offer anything further to the conversation but smiles throughout.
The US President spent two hours talking to reporters on a day otherwise packed with strategic meetings - a feat that appears to astonish the Canadian leader.
Macron can be seen speaking animatedly in the exchange, clearly not having run out of energy since his 45-minute long appearance alongside Trump.
During the tense encounter the French President challenged the Republican leader's vision for NATO and approach to the Turkish conflict.
It is not clear how the American President would react if he found out his fellow world leaders were having a chuckle at his expense.
When he announced the US would be withdrawing from the Paris climate agreement, Trump said: “We don’t want other leaders and other countries laughing at us anymore. And they won’t be. They won’t be.”
The mocking ban clearly hadn't kicked in by the following year's United Nations General Assembly when Trump said he had "accomplished more than almost any administration in the history of our country.”
He claimed that the subsequent laughter from his world leader colleagues was not directed at him but with him.
While his ability to take it may be in doubt, his ability to dish it out is not.
Notable points in a long and illustrious career of making fun of people include Trump's impression of disabled New York Times reporter Sege Kovaleski and when he implied then-Fox News anchor Megyn Kelly was on her period.
So well versed is the President in mirth making that there is a whole Wikipedia page dedicated to the nicknames he has for fellow public figures.