He had indeed heard her cursing when he arrived, so he didn't doubt that she was capable of such a thing.
Meanwhile, Kelvin had gotten closer to him. He didn't approach the speedster in a straight line, as that would set him off. He walked as if he were leaving the street, not approaching Dustin.
This meant that there would still be space between them even if they were side by side. It was this space, his speed, and the fact that Paul doesn't kill that made Dustin not run for his life yet.
Kelvin continued to explain, "I warned her to leave or I would kill her. She didn't listen to me. You saw what became of her."
Dustin nodded. He was just a goofy teenager, and the explanation made sense, so he felt that what Paul did wasn't so bad. Meanwhile, his fans groaned and covered their faces in phantom pain.
They screamed, "Run, Dustin, run."
