Justin Lee Collins tried to push his former girlfriend in front of a taxi, a St Albans Court heard on Thursday.
Anna Larke, 38, claimed the incident happened on a drunken night out with the comedian's Friday Night Project co-host Alan Carr.
The comedian arrives in court on Wednesday
Collins, also 38, is accused of harassing Larke over a period of nine months, including physical and mental abuse.
On Wednesday the court heard that Collins forced Larke to write down all her previous sexual experiences in a notebook, as well as throw away her DVD collection as the films featured men that she found attractive.
She was also instructed to only ever sleep facing him.
On the second day of the trial, Larke, who is a recovering alcoholic, was cross-examined by Sonia Woodley QC, who asked: "You once tried to throw yourself in front of a car, didn't you?"
Larke, who spent much of the day on the verge of tears, replied: "No. He tried to push me in front of a car when he was drunk out of his head.
Larke has accused Collins of harassing her over a period of nine months
"I was with him and Alan Carr," she said. "We were walking down the street and he was shoving me and pushed me into traffic.
"He pushed me in front of a car. I was lucky a man who was walking along caught me before I fell in front of the cab."
Collins' defence is trying to portray Larke as suicidal, maintaining that she had once been found self-harming, and had fashioned a noose and tried to hang herself.
Larke, a video games PR consultant, claims she made up the suicide attempts in order to stop Collins from asking questions about her sexual history.
She said: "He asked me what the worst thing I'd ever done was and I did tell him I'd tried to commit suicide. I told him to stop him from asking me things and writing them down in that Pukka Pad."
Larke also spoke about her fear of Collins.
She said: "I kept my temper right down because I was scared of what he would do. He was paranoid. He was very secretive and when I would ask him things he would say, never you mind.
"I would placate him, I kissed his arse. I would be walking on eggshells."
Larke was made to throw away her video collection, the court heard
When asked why she put up with the abusive relationship, Larke said she didn't want to get Collins in trouble as he was the love of her life.
"I didn't want to do it to Justin. He was the love of my life," she said.
Speaking from behind a screen at the court, Larke described being terrified about Collins returning from a trip to Las Vegas because she had failed to attend one of two AA meetings which had told him she would attend.
"I remember his ringing me and shouting abuse down the phone to me. I was petrified about him coming back. Absolutely petrified," she told the court.
Larke and Collins on holiday in 2011 in Miami
Larke also claimed he shouted at her and tore a 20-dollar note in front of her when she refused to have a lap dance in a club in Miami.
Earlier, the jury of nine women and three men heard that the 38-year-old star had bought her gifts including diamond earrings and a digital camera because she claimed he had hit her cat.
Larke said: "He also abused my cat - animal abuser as well. I think he felt very guilty about that which is why he furnished me gifts."
Collins denies the charge of harassment.
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