The attack began before noon on a sunny spring day, interrupting the careless chatter of Diante Cotton and his friends, who were sitting in the cafeteria when a girl clutching her neck walked in, yelling.
"He's stabbing people, he's stabbing people," Cotton said the girl shouted, his first indication that something was amiss on the normally tranquil campus.
Walking outside, Cotton and his friends saw another half-dozen people with injuries to their faces and necks. Some were being loaded into ambulances. The most critically injured were evacuated in medical helicopters.
"I turned around, and there was just blood — just blood dripping down the stairs, all over the floor, all over everyone's towels, on their necks, just a lot of blood," Melody Vinton told KHOU-TV.
The attacker ran past Vinton, she said, as she was leaving her chemistry class. He was stabbing people, she said, one after another, always aiming for the neck or face.
"There's no humanity in that. Just to see another human being do that was more traumatic than anything," Vinton said.
Vinton and other students in the science building rushed to help the victims until emergency crews arrived.
Michelle Alvarez tried to back away when she saw Quick running toward students. She didn't even feel it as he swiped her.
"He came running and swinging at my neck, as I tried to get out of the way," she told the Houston Chronicle.
It remains unclear how long the attack lasted, but Lone Star college officials said they locked down the campus shortly after 11:30 a.m. Students described phones going off informing them of the lockdown. Some stayed in class until they were dismissed. Others went out to the hallways, where they were evacuated to their cars.