What would you do?

This post is alternatively titled - Am I a bad person...

I spent last weekend up in Chicago for a friend's batchelorette party. A good time was had by all, even if I can't really comprehend what makes a drag show batchelorette party worthy (note to any friends out there - if I ever manage to find a guy who wants to marry me - no drag show, karaoke maybe, drag no). I spent the weekend with my friend L and her fiance. I also got to see my future home for the first time.

Anyway, on Saturday, before the party, L & I didn't have much to do. So, we decided to go shopping (not that I don't regularly hit up Ann Taylor and Banana Republic at home, but there is something "special" about shopping on the Mag Mile). As we were walking toward the bus route, I saw something that surprised me. I didn't know how to react.

I saw a guy open-hand slap a girl about a half-block up.

I almost didn't believe it was real. It seemed like something out of a movie or like they were acting or something. That doesn't just happen on the street. My pace slowed. I wondered what to do.

Then, I saw the girl launch herself at the guy. She clearly wasn't trying to get away. She was trying to pull him back, while yelling at him, and hitting him in the arm. At this point, L finally noticed. We slowed and stopped. I told her I didn't feel comfortable walking forward and asked if we could go a different way. We turned.

Suddenly, I heard the girl screaming behind us. We turned toward her, and the guy was now lying on the ground. Other bystanders when running toward them. Laura and I started toward them, but then noticed a cop car parked behind an ambulance on the next street (we sought help from the cop car/ambulance, but no one was there). By the time we got back to the scene - someone had called 911. We hung around the area till the ambulance showed up, but then we headed out. I didn't try to speak to the cops or anything.

A couple things remain in my mind. What should I have done after I saw the guy slap the girl (if the rest hadn't happened)? It wasn't as if she was trying to get away, and we were just a couple more girls. I don't think getting involved would have been a good idea. Should I have called 911 then? Would they even respond to a call like that ("hey, Chicago emergency department...yeah, I just saw a guy slap a girl on the street in the West Loop...you might want to check that out")?