was left gobsmacked on a celebrity edition of s when guest TV star revealed she played a key role in developing a staple of British sheds - the leaf blower. The Steph's Packed Lunch presenter took to the famous hot seat in the quiz show's celebrity charity special.
But before the grilling began, The Clarkson's Farm frontman couldn't resist digging into McGovern's surprising past - and it left him seriously impressed. "I was looking at your notes," Clarkson said, clearly taken aback. "Obviously, business and economics you're known for, but you're also a champion Irish dancer and a novelist, and a journalist, and most important of all, an engineer by trade.
"And you developed the leaf blower! Couldn't you have made it electric?" Smiling, McGovern explained that when she worked at Black+Decker "20-odd years ago", an electric version wasn't on the cards.
She worked on the company's Leaf Hog product as part of its Six Sigma squad, helping it save £150,000 a year by improving its manufacturing techniques.
Clarkson, in typical form, joked: "There's nothing more annoying, am I right, than somebody else's leaf blower?"
Before her TV career took off, McGovern, 43, was blazing a trail in engineering. She won the prestigious Arkwright Engineering Scholarship in 1998 and was crowned Young Engineer for Britain a year later.
Her Millionaire appearance, which was a repeat from earlier this year, wasn't just impressive for her backstory - it was a win for charity, too. Representing Rubies, a Middlesbrough-based organisation supporting young girls, McGovern walked away with a whopping £150,000.
"I am happily gonna take the money and am not gonna carry on, if that's okay", she told Clarkson, wisely bowing out before risking a tough £250,000 question.
The charity, which McGovern has supported for over five years, helps create "unforgettable" experiences for girls, including trips to TV studios with Steph herself.
It was a far cry from fellow contestant Anton Du Beke's performance, who left viewers cringing after a brutal wrong answer on his celebrity special episode.
The Strictly Come Dancing star stumbled on the question: "Which Tony Award-winning musical features a mash-up called 'Elephant Love Medley'?" He answered The Book of Mormon, but the correct response was Moulin Rouge.
The mistake meant Du Beke left with just £1,000 for his charity, The Sick Children's Trust.
Fans were quick to vent on social media. "The audience are absolute FOOLS and so is Anton Du Beke. Surely this is his wheelhouse??" one user posted on X, formerly Twitter.
Another added: "That mishap means Anton is only taking £1k for his charity... ouch."