BBC Breakfast had a bit of a hiccup this morning, when the man they thought was coming in to talk about mountain climbing was in fact an expert on Donald Trump.
Jon Kay and Rachel Burden were expecting to have Leslie Binns on the red sofa.
He helped save a woman who had collapsed on a trek up Mount Everest.
Instead, when they cut to their guest, another man was seated. Dr Todd Landman was there to discuss US politics.
"I think you have the wrong man," he said as they turned to him.
"Do you know, it's ever so funny," said presenter Rachel Burden when she realised the wrong man was sitting down.
"I looked at this man and thought, 'He doesn't necessarily look like a mountaineer.'"
Dr Landman told them: "I have many heroic stories to tell but not involving Everest."
In addition to his academic career at the University of Nottingham, Dr Landman is an illusionist and member of the Magic Circle.
Leslie Binns appeared on the show later in the morning to tell his life-saving story from Mount Everest.
"This was a genuine mistake and immediately corrected on air. Thankfully both our guests saw the funny side," said the BBC in a statement.
The mishap recalls the time a supposed taxi driver appeared on BBC News, instead of the guest who had been expected.
Guy Goma was mistaken for an expert on the internet music business, Guy Kewney.
Guy Goma had been at the BBC for a job interview.
It was mistakenly reported that he drove a cab.
Mr Goma said his appearance was "very stressful" and wondered why the questions were not related to the data support cleanser job he applied for.
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