"He grabbed both my arms and screamed in my face, 'DON'T EVER TOUCH ME AGAIN!'" Philipps writes in the leaked excerpt, which THR verified is from the book. "And he threw me to the ground. Flat on my back. Wind knocked out of me."
The actress says the outburst wasn't scripted, but the action that sparked it was. Philipps writes that the script they were shooting called for her character to nudge Franco in the chest, but he took it personally.
Philipps says her co-star eventually apologized at the behest of the episode's director and producers.
"At the time, but we've since made amends, James Franco and I didn't really get along when we were on 'Freaks and Geeks,'" she said on the Bravo late-night show. "We were 19, and we really disliked each other. It's well documented, he like shoved me to the ground once. It was like really brutal, but we're friends now and we like really like each other now as adult. But as kids we did not get along."
TooFab has reached out to Franco's publicists for comment.
"This Will Only Hurt a Little" hits shelves on Oct. 16. It will also cover her being raped at 14 -- a trauma she revealed on Instagram last month in support of Dr. Christine Ford testifying in front of the Senate that Supreme Court Justice Brett Kavanaugh sexually assaulted her in high school.
"This is me at 14 -- the age I was raped," she captioned the shot. "It's taken me 25 years to say those words. I wrote about it in my book. I finally told my parents and sister about it four months ago."
"Today is the day we are silent no more -- all of us," she continued. "I'm scared to post this. I can't imagine what Dr. Ford is feeling right now."