As President Biden turned to walk off the stage following a news conference in Geneva after his summit with Russian President Vladimir Putin, a reporter shouted out one final question.

“Why are you so confident [Putin] will change his behavior, Mr. President?” CNN’s Kaitlan Collins asked.

The president, who had already turned away from the clutch of journalists, threw up his hands and started back toward the reporters while wagging his finger.

“What the hell? … When did I say I was confident?” Biden said as he headed back toward Collins, before launching into a tense back-and-forth with the reporter while defending his approach with the Russian president.

Biden’s flash of frustration briefly revived memories of president Donald Trump’s frequent heated exchanges with the White House press corps, though Biden’s staid summit with Putin was in stark contrast to the deference Trump brought to his interactions with the Russian leader. As his exchange with Collins went viral, some critics jumped to defend the reporter, while others argued that her question unfairly reflected the president’s earlier statements.

Soon after the exchange, Biden issued a mea culpa for his tone.

“I owe my last questioner an apology,” the president told reporters on the tarmac as he readied to board Air Force One on Wednesday afternoon. “I shouldn’t have been such a wise guy with the last answer I gave.”

Biden and Putin met on Wednesday in their first summit to discuss several topics, including alleged cyberattacks and human rights violations that have strained relations between Russia and the United States. Afterward, Biden characterized the meeting as “positive,” and Putin called it “constructive.”

But Collins, who made headlines last year when she refused to move to the back of the room during a Trump briefing, pushed back on those claims.

After she shouted her question to Biden, the president said she was mischaracterizing his stance.

“I said what will change their behavior is if the rest of the world reacts to them and it diminishes their standing in the world,” Biden said after snapping at her. “I’m not confident of anything. I’m just stating the facts.”

Collins pressed the president again, asking why the meeting, which lasted about three hours, should be viewed as constructive when Putin later downplayed human rights abuses and denied Russia played a role in cyberattacks against the United States.

“If you don’t understand that, you’re in the wrong business,” Biden said to the reporter before turning and leaving the stage.

The tense back-and-forth soon staked a claim as one of the most interesting moments of the day. One clip of the video garnered more than 300,000 views on Twitter by early Thursday, and Wednesday’s late-night shows seized on the moment.

President Biden met with Russian President Vladimir Putin for a one-on-one meeting in Geneva on June 16. Late-night hosts had a lot to say. (The Washington Post)

“That was some strong ‘grandpa has had it with your lip’ energy,” “The Late Show” host Stephen Colbert said before imitating an old man scolding a misbehaving child.

“Anyway, U.S., Russia, nuclear weapons — I’m sure it’s all going to be fine,” Colbert added.

CNN did not immediately reply to a request for comment, but Collins on Wednesday defended her questions and said Biden had no need to apologize for his response.

“That is completely unnecessary,” she said of the apology on CNN. “… It is just our job to ask the president questions. That is the business we are in.”

Despite his apology to Collins, Biden still seemed ruffled by questions about whether the meeting with Putin had been a success as he spoke to reporters on the tarmac before boarding Air Force One for the return flight to Washington. When another reporter asked Biden what evidence he had that any progress had been made at the meeting with Putin, the president again expressed frustration.

“Look, to be a good reporter, you’ve got to be negative,” Biden told the journalists gathered around him. “You’ve got to have a negative view of life, it seems to me. The way you all, you never ask a positive question.”