Nerves. They can get the better of the best of us.

A hilarious exchange between a 7 News reporter and a Melbourne jogger has gone viral over a not-so-bright gaffe that was caught on camera.

The jogger, Erica O'Donnell, was running around The Tan track bordering Melbourne's Botanical Gardens when she was stopped for a quick vox pop by reporter Michael Scanlan.

Scanlan was doing a story on how exercising twice a week had almost identical health benefits as exercising every day.

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During the interview, Scanlan asked the woman for her first and last name.

"Erica O'Donnell," she replied.

"And can you spell - first and last?" asked Scanlan.

"F-I-R-S-T, L-A-S-T," replied O'Donnell.

There's a brief second in which the jogger looks completely and totally sure that she's just nailed a TV interview.

'That was right, wasn't it?' Photo / Channel 7
'That was right, wasn't it?' Photo / Channel 7
'Come on, isn't that what you asked me to do?' Photo / Channel 7
'Come on, isn't that what you asked me to do?' Photo / Channel 7
'WHY ARE YOU LOOKING AT ME LIKE THAT?' Photo / Channel 7
'WHY ARE YOU LOOKING AT ME LIKE THAT?' Photo / Channel 7

Then Scanlan begins to laugh.

"I meant your first and last name!" he says.

And then BOOM! The moment of realisation sets in:

Erica O'Donnell delivered the ultimate gaffe during a TV interview with Channel Seven. Photo / Channel Seven
Erica O'Donnell delivered the ultimate gaffe during a TV interview with Channel Seven. Photo / Channel Seven

"You know, in a decade no one has ever done that," Scanlan said.

The pair had a good laugh about it, and O'Donnell still went on to feature in the story. She was a damn good sport about it!

Scanlan's tweet has reached more than 700 retweets and more than 1500 likes since it was posted.