The model, who has reportedly been cozying up to singer Cody Simpson, narrowly escaped drive-by shooter Elliot Rodger in May 2014 when he randomly opened fire from his car to kill three people near the University of California, Santa Barbara, after fatally stabbing three others in his apartment.
"He did it so nonchalantly. He was just driving, he smiled at me, said something and then lifted up like this and just started shooting," Sierra Swartz, then an 18-year-old Santa Barbara City College student, told KEYT at the time.
Swartz has gone on to pursue modeling and is also an aspiring actress who has caught the eye of the 19-year-old Australian-born singer, who has previously dated Gigi Hadid and Kylie Jenner. According to Billboard, the two engaged in some serious PDA backstage at last week's Malibu Guitar Festival after Simpson performed a 45-minute set with his band, Coast House.
Simpson also enjoyed a boys' weekend at Coachella, which Swartz attended as well, per her Instagram.
The happy scenes are a far cry from the terror she experienced two years earlier when she felt a bullet whiz by her during the terrifying rampage.
"The fact that I can remember the wind pass through my face. Like, I didn't even know that happened in a gunshot," said told KEYT.
Swartz told the news station she instinctively ran toward the first open door she could find.
"I just ran in their house and I was like, 'I just got shot at. I just got shot at,' " she explained.
Ryan Gerard and two friends were home when Simpson walked in with an older homeless man who was also looking to escape.
"She was crying, saying 'He has a gun. He has a gun.' And ran right into our house," said Gerard, who later found a bullet lodged into the side of his house.
Swartz told KEYT she returned home to San Diego after the shooting, traumatized by the ordeal.
Rodgers turned the gun on himself as police closed in. His father, an assistant director on The Hunger Games, later released a statement on behalf of the family through an attorney.
"The Rodger family offers our deepest compassion and sympathies to the families involved in this terrible tragedy," read the statement. "We are experiencing the most inconceivable pain and our hearts go out to everyone involved."