"He approved it and they said, 'Michael, she's 15 so you can't sit her at the bar and she can't have a drink in her hand.' So his solution to that problem was to then have me dancing underneath a waterfall getting soaking wet."
"Perfectly wholesome," said Kimmel, as the audience laughed.
"At 15! I was in 10th grade. That's kind of a microcosm of how Bay's mind works," Fox continued.
"Yeah, well that's really a microcosm of how all our minds work, but some of us have the decency to repress those thoughts and pretend that they don't exist," Kimmel said.
As the clip resurfaced, fans flooded social media with messages of support for Fox, whose career fortunes slid after working with Bay:
Fox shot to fame in the first two Transformers films, both directed by Bay, but was dropped from the franchise after comments she made about him in an infamous 2009 Wonderland interview.
"He's like Napoleon, and he wants to create this insane, infamous mad-man reputation," she told the magazine.
"He wants to be like Hitler on his sets, and he is. So he's a nightmare to work for."
Fox then didn't appear in the next Transformers film, 2011's Dark Of The Moon, but the same year Bay insisted there was no bad blood between them.
"I wasn't hurt because I know that's just Megan," he told GQ.
"Megan loves to get a response. And she does it in kind of the wrong way. I'm sorry, Megan. I'm sorry I made you work 12 hours. I'm sorry that I'm making you show up on time. Movies are not always warm and fuzzy."
In a 2018 interview, Fox addressed her experiences in Hollywood before the advent of the #MeToo movement, and suggested her accounts of her experiences were not always taken seriously.
"My words were taken and used against me in a way that was – at that time in my life, at that age and dealing with that level of fame – really painful," she told The New York Times.
"I don't want to say this about myself, but let's say that I was ahead of my time and so people weren't able to understand. Instead, I was rejected because of qualities that are now being praised in other women coming forward.
"And because of my experience, I feel it's likely that I will always be just out of the collective understanding. I don't know if there will ever be a time where I'm considered normal or relatable or likeable.
"Even with the #MeToo movement, and everyone coming out with stories – and one could assume that I probably have quite a few stories, and I do – I didn't speak out for many reasons.
"I just didn't think based on how I'd been received by people, and by feminists, that I would be a sympathetic victim."
In recent years, Fox's on-screen roles have been more sporadic as she's raised three children with husband Brian Austin Green. But the pair last month revealed they were separating after 10 years of marriage, and Fox is now dating rapper Machine Gun Kelly.
