• Donald Trump Jr. mocked President Joe Biden for falling on the steps of Air Force One on Friday.
• Biden stumbled three times and fell once as he ascended the steps to board the plane. 
• Trump Jr. posted to Twitter a video showing his father striking Biden with a golf ball and causing him to fall.
• See more stories on Insider’s business page.

Donald Trump Jr. shared a video on Twitter mocking President Joe Biden’s three stumbles on Friday. 

The video showed former President Donald Trump taking a shot on the golf course — one of his favorite pastimes. The golf ball Trump hit flew into the greenery and came back in another frame, striking Biden in the head and knocking him down on the steps of Air Force One. 

“It wasn’t the wind folks,” Trump Jr. wrote on Twitter.

—Donald Trump Jr. (@DonaldJTrumpJr) March 19, 2021

Biden slipped twice as he climbed up the steps Friday. The third time, he stumbled and fell down. 

At the top of the steps, Biden, 78, looked back and waved before boarding the plane. 

Biden’s age and history of foot injuries led to reporters asking questions about his health after the three stumbles. 

White House communications staff members told reported that Biden is unharmed and doing well. 

“It’s pretty windy outside,” White House Deputy Press Secretary Karine Jean-Pierre said. “It’s very windy. I almost fell coming up the steps myself. He is doing 100% fine.”

Trump Jr.’s tweet was met with backlash from Twitter users, including some celebrities and journalists. 

—S.V. Dáte (@svdate) March 19, 2021

“Does every member of the trump family have the intellect of an angry kindergartener?” one user wrote in response to his post. Another user said they reported the tweet and cited it as “disrespectful.”

Trump Jr.’s tweet did not violate Twitter policies, according to The Hill, which cited a spokesperson from the social media platform. 

Weeks after winning the 2020 presidential election, Biden fractured his foot while playing with his dog Major. 

Kevin O’Connor, Biden’s doctor, said in a statement that a scan “confirmed hairline (small) fractures of President-elect Biden’s lateral and intermediate cuneiform bones, which are in the mid-foot.”

At the time, O’Connor said that “it is anticipated that he will likely require a walking boot for several weeks.”

Biden, 78, is the country’s oldest president. During his campaign against Trump, Biden vehemently denied having any issues with his health. He and his campaign dismissed all health concerns, as well as released a medical report last year from Biden’s doctor. The report said Biden is “healthy” and “vigorous.”