In Hush Hush, what did Nora notice shortly after she stuck a pedestrian with Vee’s car?

From the text:

He was crouched a few feet away, watching me. He didn't look at all ... injured. He was dressed in total black and blended with the night, making it hardto tell what he looked like. At first I couldn't distinguish any facial features, and then I realized he was wearing a ski mask.