Former US president Jimmy Carter gave himself a black eye when he fell over at his Georgia home.
The 95-year-old, who is the oldest president in US history, said he had to go to the hospital and get 14 stitches.
The nasty injury did not prevent him from attending a concert for Habitat for Humanity volunteers in Nashville, Tennessee.
The organisation builds homes using volunteers and makes no profit on the sales.
He was joined at the event by his wife Rosalynn, 92.
“I had a number one priority and that was to come to Nashville and build houses,” he told the crowd at the concert where country music stars Garth Brooks and Tricia Yearwood.
At one point, he returned to the stage solely to point out that the Atlanta Braves, whose team hat he was sporting for the evening, had won their game that day.
The Carters have been highly active supporters of Habitat for Humanity for over three decades.
Mr Carter has said that he appreciates the hands-on aspect of the group, adding that the project “has successfully removed the stigma of charity by substituting it with a sense of partnership.”
The group is scheduled to build 21 homes in a Nashville neighbourhood following the event.
