She was walking fast. It was 9:20 p.m. She was hoping to catch the B train. It usually arrived at the station at 9:28. The Brooklyn sidewalk was hazardous at night. It was poorly lighted. Also, spreading tree roots had made sections of it rise abruptly every few yards. Walking fast at night could easily result in scraped knees and hands. Nevertheless, she hurried along. Watching the sidewalk closely, she looked up just before bumping into someone. He had just crossed the street. He said, "Watch it, will you? You almost knocked me over." She said, "You watch it. I was on the sidewalk before you. I had the right of way. You should look both ways before you step onto the sidewalk." He said, "It's not my fault. I didn't see you or hear you. You're like a ghost. Let people know you're there. Use a flashlight. Walk louder."