Joe Biden was reportedly confronted by a "large, naked Scottish man" while he was on his way to attend the COP26 Climate Change Summit.
As the US president and his staff were driving through country roads from Edinburgh to Glasgow, his motorcade was apparently photographed by a starkers man who stood in the front window of a house the convoy passed.
Reporting on the incident, White House journalists said: “At one point when we were still on smaller country roads, a large, naked Scottish man stood at his front window taking a picture of the motorcade with his phone.”
The exact location of the incident and the identity of the naked man are yet to be confirmed, the Daily Record reports.
Yesterday, Mr Biden apparently fell asleep for about 20 seconds as the conference in Scotland began.
A clip shared on Twitter by a reporter for The Washington Post shows the 78-year-old president dozing off before an aide approaches him and seems to wake him up.
The video shows Mr Biden listening to the staff member, before applauding the speaker.
British Prime Minister Boris Johnson was also photographed with his eyes closed as he sat between United Nations Secretary General Antonio Guterres and David Attenborough.
Speaking at the conference today, Mr Biden said the United States would lead by example when it comes to sharing green technology innovations.
It comes as scores of countries joined a pledge to cut their methane emissions by 30% by the end of the decade as part of efforts to tackle climate change.
Cutting methane, a powerful but relatively short-lived greenhouse gas which comes from sources including fossil fuel extraction and livestock farming, is seen as making a significant short-term contribution to climate action.
Half of the world's top 30 methane emitters, including the US, EU, Indonesia, Pakistan, Argentina, Mexico, Nigeria, Iraq, Vietnam and Canada, have joined the pledge.
Speaking at the summit, Mr Biden thanked those who have signed the "game-changing commitment", saying: "Together we are committing to collectively reduce our methane by 30% by 2030, and I think we could probably go beyond that.
"Today it's approaching 100 countries that are signing on. That's nearly half the global methane emissions... It's going to make a huge difference."
The US president added this would not only help fight climate change but also improve health, cut crop losses and reduce pollution.
He added: "One of the most important things we can do in this decisive decade to keep 1.5 degrees is reduce our methane emissions as quickly as possible.
"It's one of the most potent greenhouse gases there is. It amounts to about half the warming we are experiencing today."
European Commission president Ursula von der Leyen said she is "proud and happy and grateful that over 80 countries have signed up".
