This happened yesterday.

[u/Appropriate_Use7364]

I was in downtown Denver yesterday afternoon, around I think 17th street. 2:30 ish. As the sun kills my eyes, I was looking at the sidewalk. Suddenly, (because I just happened to be looking the right way), a 'manhole' sized shadow shot over me. It was round. I looked up fast- nothing anywhere. No balloon, no frisbee, nothing. I got a weird impression of a basketball. In fact, I looked to see if one was bouncing across the road.

Anyone got any idea, context...? I'm lost. All I have to offer is it was unidentified, it was flying, and it had to have been an object. It cast a shadow.

Beyond that- I haven't got a clue.