Playing chicken on the sidewalks of London

If there's one thing I learned today, it's that it doesn't matter how small you around, if get a good solid elbow shot to the kidney you're going down. I'm not small fella but after I tried playing chicken on a sidewalk in London against a small woman whom I was sure was no bigger than 5'4" I realised error in my ways. She wanted to get by me, she was in a rush, and she had WAY better technique than I did. It was pretty much a sharp jab with her elbow to my torso and she was gone. I didn't even know what happen to me. Now, I'm on jerk, and I would have gladly moved half way if she had done the same, but this happened way to quick for me to react. For some reason I feel like she had been gunning for me 20 feet earlier. She found her target, locked on, and then like a smart bomb with laser guiding, took me out of her equation of trying to get to her destination. I'm in the process of searching online for an armour plated vest to protect the kidneys for the next time this happens.