Kendall Jenner has told a court she was terrified when an alleged stalker followed her up the driveway of her Hollywood Hills home and repeatedly banged on the window of her car.
The 20-year-old model and reality TV star used her hands to illustrate how she made frantic phone calls to friends after locking the doors and watching Shavaughn McKenzie until help arrived.
"I've never been so scared in my life," she told the Los Angeles jury hearing the case against McKenzie.
Kendall said she recognised McKenzie as the person who had accosted her twice while she was driving outside an apartment she owned in Westwood.
She kept her composure through more than two hours of evidence about McKenzie, 25, who was arrested in August outside her home and charged with misdemeanour stalking and trespassing.
McKenzie, from Florida, has several trespassing convictions unrelated to Kendall. He could face up to six months in jail if convicted of either charge.
McKenzie stared at his lap or towards a wall on the opposite end of the courtroom throughout much of the evidence.
His lawyer Taylor Shramo told jurors his client has a severe mental disorder and was unarmed and simply trying to talk to the model.
Kendall, who wore a backless beige blouse and jeans to the crowded courtroom, said she first spotted McKenzie sitting in a street outside her Hollywood Hills home and was suspicious as she pulled into her tree-lined driveway and watched the 13ft-tall gate close behind her.
McKenzie somehow slipped through and wasn't noticed until Kendall prepared to leave the car, she told the court.
Even after McKenzie was arrested, Kendall refused to leave her car. "I was terrified," she said. "I was literally traumatised."
Deputy City Attorney Alex Perez told the jury that McKenzie was an "obsessed, mentally unstable fan" who had repeatedly tried to meet Kendall outside her homes.
Shelli Azoff, who rushed with her husband to aid Kendall after getting a call that night, told the court the incident left her friend shaken.
Kendall stayed with the Azoffs for several nights and was afraid to sleep alone, Shelli told the court.
Kendall said she has added lights, cameras and a security detail at her home since McKenzie was arrested.
"It's definitely put me even more on edge," she said. "I definitely don't feel safe in my own house any more."
Kendall is the younger sister of Kim Kardashian West and in court she recounted her career, which includes appearing on her family's reality show Keeping Up With The Kardashians, doing a cover photo for Vogue magazine and modelling for top fashion lines.