According to the Chuk sisters, the attack happened shortly after 7 a.m. Saturday on Jefferson Street near 10th Street. Tiffany Chuk told NBC Bay Area Saturday that the suspect drove the wrong direction on a one-way street and then, he backed into a parking spot. That’s when he apparently jumped out and attacked a man of Asian descent. “He jumped on him from behind, knocked him to the ground and punched him in the head,” she said. Tiffany Chuk said she and her family wanted to help. So, she pulled out her phone and shot this video. While her brother called 911 and her sister banged on the window to distract the suspect.