However, as more and more people tweeted in to the presenter, they had no choice but to address the incident live on air, with hilarious consequences.
Walker then informed viewers that his camera team would not be zooming up close to the action.
People took to social media to poke fun at the incident, with one tweeting: "Is something going on on the beach behind Dan Walker??"
Another wrote: "Couple behind Dan Walker's beach hut on BBC4 - they're hugging/reading a book, he says."
One user added: "It book must have been 50 Shades of Grey the way his groin area was gyrating!!!"
Shortly afterwards, Walker took to Twitter to poke fun at the incident, posting: "It's live TV. Anything can happen!"
It isn't the first time Dan Walker has made an impression while presenting at this year's Olympic Games.
A rowdy hen party interrupted the reporter while he was presenting the late-night show in Rio at the weekend.
More than a dozen lively women staggered past singing, and Walker duly pointed them out to the camera-crew.
He then made the brave decision to invite the bride over, and interviewed her on-air.
"This could be interesting," he remarked as the woman stumbled her way past security.
She then proudly revealed she is due to be married in September, while her party of revellers chanted "Maria, Maria, Maria".
Soon enough Maria started making declarations of love to her fiancé.
And unaware of what station she was on, the bride asked where she was.
When Walker told her it was the BBC she jolted back in shock, before rubbing two fingers together to suggest he must therefore be very wealthy.
