World leaders tell jokes about Trump. But the implications aren’t funny at all.

It’s one thing when American late-night TV show hosts and online commenters make fun of President Donald Trump. It becomes something completely different — and, frankly, alarming — when world leaders mock the president.

On Thursday, a video leaked showing Australia’s Prime Minister Malcolm Turnbull mimicking Trump’s unique speaking style and exaggerated hand gestures, and stealing his lines: “The Donald and I, we are winning and winning in the polls. We are winning so much! We are winning like we have never won before,” said Turnbull, to raucous laughter from the audience at the Australian Parliament’s annual midwinter ball.

“Not the fake polls,” he continues. “They’re the ones we’re not winning in.”

If you watch the video, it is undeniably funny. The prime minister later tried to downplay it, claiming that he was actually making fun of himself, not Trump. “It’s a good-humored roast,” said Turnbull, according to the BBC. “My speech was affectionately light-hearted.”

But even though Turnbull thought his comments were off the record, he was still mocking the US president as a pompous clown in front of a room full of journalists and fellow politicians. When viewed in a wider context, that’s more than a bit unnerving. This is an ally of the United States blatantly demonstrating that he doesn’t take the president seriously.

Ian Bremmer, an American political scientist and president of the global risk-assessment firm Eurasia Group, argues that Turnbull’s charade shows that world leaders think Trump is the “least capable person ever to sit in the office” and are “appalled” that they have to work with him.

Here’s Bremer’s full quote, as told to the Washington Post Thursday night:

In the private conversations I’ve had with heads of states and ministers of foreign relations … they all feel what Turnbull just basically came out and said: This is, by far, the least capable person ever to sit in the office and it’s appalling they have to deal with him. … Even in a country that really needs to have a good relationship with the United States, you’re just not willing to deal with it. Your own ego will say, ‘Screw this guy.’ 

The Australians have made some blunt and damning comments about Trump before. Back in February, Trump blasted Turnbull over a refugee resettlement agreement during their first phone call, which ended 30 minutes early when Trump hung up. Graham Richardson, a former senior Australian cabinet minister, called the US president’s reaction a “normal Trump tantrum.”

This wouldn’t be as surprising if the comments came from a leader of a country whose relationship isn’t as close as Australia’s is with the US.

As my colleague Zack Beauchamp notes, Australia is an important and reliable ally. The country has fought alongside the US in nearly every major war over the past 100 years, including Vietnam and Iraq, that many other allies were hesitant to support. It’s also an important partner in the coalition fight against ISIS, with several hundred on the ground in the Middle East contributing to the counter-ISIS campaign.

Trump’s antics have become fodder for a number of politicians around the world.

French President Emmanuel Macron invited American climate change researchers to move to France last week by launching a website called “Make Our Planet Great Again,” an obvious play on Trump’s campaign slogan.

Last month, five Nordic prime ministers reenacted a photo of Trump, the Egyptian president and the Saudi king placing their hands on a glowing orb. Except the Nordic leaders used a soccer ball instead.

Mexico’s former President Vicente Fox mocked Trump’s love of taco bowls (“they are not even Mexican”) and emphasized that Mexico will not pay for a border wall in an profane YouTube video.

Even Russian President Vladimir Putin has trolled Trump. On Thursday, he offered political asylum to fired FBI Director James Comey.

It seems like this is the new normal, and it’s frightening. When world leaders would rather make jokes about Trump than work with him, there are sure to be implications for American foreign policy.

Some of this stems from Trump’s own unpredictability when it comes to foreign policy. Earlier in June, he finally committed the US to coming to the defense of any NATO member nation attacked by Russia after publicly criticizing the alliance for months. When Trump made the decision to withdraw the US from the Paris climate accords, leaders around the world expressed disappointment and frustration.

With the uncertainty of how Trump will respond in any foreign policy situation, world leaders can do little more than make jokes and wait for the next shoe to drop.