Hillary Clinton described Donald Trump as a “creep” and someone who “made my skin crawl” when he followed her around the stage during their second presidential debate, according to an excerpt of her new book.

“No matter where I walked, he followed me closely, staring at me, making faces. It was incredibly uncomfortable. He was literally breathing down my neck. It made my skin crawl,” she said in an excerpt of her book “What Happened” shown Wednesday on MSNBC’s “Morning Joe.”

The two candidates faced off on Oct. 9, 2016, just two days after a tape surfaced of a 2005 Trump appearance on “Access Hollywood” in which he bragged about groping women. “When you’re a star, they let you do it,” he said.

At one point during the town hall-style debate, Trump began shadowing Clinton as she walked around the stage while answering a question.

She said Trump was “looming” behind her and she questioned whether she should just “stay calm and keep smiling” or confront him.

“Do you turn and look him in the eye and say loudly and clearly, ‘Back up, you creep. Get away from me. I know you love to intimidate women but you can’t intimidate me. So back up,'” she wrote in the book excerpt.

But she said she decided not to lash out at Trump on stage at Washington University in St. Louis.

“I kept my cool, aided by a lifetime of dealing with difficult men trying to throw me off. I did, however, grip the microphone extra hard,” she said in the excerpt of the book, which is scheduled to come out on Sept. 12.

But later she said she had second thoughts about how she handled Trump’s behavior and thought confronting him would have been the better option.

“It certainly would have been better TV. Maybe I have over-learned the lesson of staying calm, biting my tongue, digging my fingernails into a clenched fist, smiling all the while, determined to present a composed face to the world,” she said.

In the book, she also said she would not provide a “comprehensive account” of the 2016 presidential race. Instead, she said she wanted to tell her side of the campaign.

“I want to pull back the curtain on an experience that was exhilarating, joyful, humbling, infuriating and just plain baffling,” she said.

She also talked about the pressure of being the Democratic presidential candidate taking on Trump.

“Every day I was a candidate I knew that millions of people were counting on me, and I couldn’t bear the idea of letting them down. But I did. I couldn’t get the job done. And I’ll have to live with that for the rest of my life. ”

She said there were many moments from the campaign that she wishes she could do over while poking fun at how the Russians hacked her emails.

“If the Russians could hack my subconscious, they’d find a long list,” she said.