Halo, halo, halo... it was/is breathtaking

So, I'm walking to work on a Saturday afternoon. Around the University of Nairobi, there are a bunch of birds just going round and round and round in circles... and then I see it. Scientific reasons aside, it was lovely. Having never seen or even heard about it before, I was transfixed.
I continued to walk, on the overpass, telling everyone I met to look up... they loved it too. Some just thought I was crazy and missed out. I couldn't stop, I kept walking, and nearly bumped into a few people, got hit by a few cars, fell off a few curbs. How, though, is everyone not as jazzed by this. It's not that common. And it's beautiful, breathtaking actually. Hence the near bumps and falls. This is what it looks/looked like. Wonder if it's still there. I'm going to have to go out and see it one more time.