Joe Biden is mocked after ‘shaking thin air’ in latest gaffe after speech where he claimed he was a ‘full professor’

THE president left people puzzled on Thursday when he appeared to turn to shake someone's hand – despite nobody being on stage beside him.

Joe Biden, 79, had finished a speech on the nation’s supply chain crisis when the gaffe occurred, leading to an awkward couple of seconds.

In a now-viral clip of the speech in Greensboro, North Carolina, the president ended with “God bless you all,” before turning to his right and motioning toward the empty space behind him.

Biden then put his hand out and appeared to go for a handshake. It could be possible that he didn’t know he was alone at the podium.

He then looked around the stage as music played in the background. 

Texas Senator Ted Cruz, 51, shared a clip of the speech captioning it with the double eyes emoji.

Others took the opportunity to once again question the president’s mental state.

“Where are the White House and Biden family handlers whose job it is to make him look good?” wrote former vice chairwoman of the California Republican Party

“This is truly bizarre, unless they WANT him to look like a dementia patient," she wrote.

, who is running for Congress in Tennessee’s Republican Primary, called Biden “unfit to be President. Period.”

Biden was in Greensboro to visit North Carolina Agricultural and Technical State University in an effort to put pressure on Congress to approve the Bipartisan Innovation Act to increase funding for domestic production of semiconductors.

“What people don’t know is that 70 percent of the increase in inflation was the consequence of Putin’s price hike," said the president, speaking about the Russian leader.

In another odd twist, Biden claimed that he used to be a “full professor” at the University of Pennsylvania.

“I’ve been at a lot of university campuses, matter of fact for four years, I was a full professor at the University of Pennsylvania.”