What's the funniest/strangest thing you have seen out your office/apartment window?

This just popped into my head after a similar question came up with a coworker…

Back a few decades ago I worked in Kendall Square in Cambridge, MA. My office window looked out towards another building about 15 feet away, and for some reason our floors were about 8 feet higher than the other building. So we could look down into the offices across the way.

The person in the office I could see into had his desk set up so that his back was to the window and he faced his office door. This gave me and my coworkers a clear view of his computer screen over his shoulder. He played Microsoft solitaire constantly, except when somebody walked in. He would very quickly close it so he wouldn’t get caught.

My coworkers and I actually tried to figure out his phone number, but never did. We wanted to call him up and tell him he should have played the red 9 on the black 10…