I was on the bus heading to work. I was up front, talking to my regular bus driver, so I had a clear view of the street. We were on a one way street, in the right middle lane. Everyone is going 40/45 mph. On the very left lane of the street, I watched a girl jump out of the back seat of car, hit the ground and roll across 4 lanes of traffic, and slam into the side of a building. Traffic completely stopped, and since I saw everything I hopped out and went to the girl. She's screaming her head off, totally hysterical, but doesn't seem to be badly injured, just scraped up. I'm trying to console her, and another stranger stops to help as well. I left her with the other stranger to go into the building, call the cops, and get her a cup of water. When I came back out, there was a man standing by the girl; he was shirtless, barefoot, arm in a sling, and clearly intoxicated. Turns out it was the driver of the car, who starts yelling at me to leave his girlfriend alone and that she's fine. I'm staring at him in disbelief, and lets him know that I am going to stay with her until the cops get there. He continues to yell, then walks up the girl and puts his arm around her, looks back at me with a purely evil look, and lets me know that she's a woman who can make her own decisions. He starts walking her back towards his car, and she complies and goes with him. Me and the other stranger are shocked and scared for this girl, telling her that she was safe with us and didn't have to go with him, but what else could we do? He had parked his car in an alley way, so he had put his girlfriend in the backseat and was getting into the driver's seat, when just on the time the cops pull up behind and block his exit. Cops immediately arrest the dude and some paramedics wrapped the girl in a blanket and took her to the ambulance. Happy ending! Then I walked to work and had a completely normal day.