Last Week Tonight host John Oliver was baffled by the latest news cycle surrounding President Donald Trump. “Trump dominates the news cycle the way a fart dominates the interior of a Volkswagen Beetle,” Oliver said. “There is simply no escape from him.”

The latest example came when Trump triggered minor international confusion over the weekend when, at a Saturday rally, he seemed to suggest there had been some sort of attack in Sweden: “We’ve got to keep our country safe. … You look at what’s happening last night in Sweden. Sweden? Who would believe this? Sweden. They took in large numbers. They’re having problems like they never thought possible.”

This confused everyone, including Sweden. There was no major attack in Sweden on Friday, as Trump implied. The confusion eventually led Trump to clarify that he was talking about crime and immigrants generally in Sweden, based on a report from Fox News. And this isn’t even the first time something like this has happened; Trump’s team has gotten into trouble repeatedly over making up fake terror attacks, like the nonexistent “Bowling Green massacre.”

“Here’s where we’re at right now,” Oliver said. “Trump can dominate the news merely by referencing something that didn’t happen in Sweden.”

The story, however, serves as a warning to other countries. Oliver explained, “Just a quick message to all other countries on Earth: In the future, you’re going to find yourself wanting to ask, ‘What is your president talking about?’ a great deal. And the answer is almost always going to be, ‘We have no fucking idea.’”

Watch: How Donald Trump thinks about foreign policy