Hi everyone.
Saturday morning I was walking to my sister's house. We live in a suburban area that's part of a larger metropolitan area. We have our main international airport, and then we also have a much smaller municipal airport about 10-ish miles from my house, so we get a lot of airplane traffic - mostly major airlines going to the international airport and then Cesnas and smaller planes going to the municipal airport. We have planes going over our house every day.
As I was walking, I was jamming out to some music, looking up at the sky because I could see blue sky despite there also being a ton of clouds. Then I saw a very low plane - lower than the airliners fly (and usually they're low when they're descending to land). This was so low that I paused and thought "whoa, that's way too low" and had a fleeting thought it might crash. Then I noticed the tail of the plane. It was weird - like a zig zag shape. I did not take a picture, but I've included a really poorly drawn picture of how I remember it.
I watched it for a few moments and then it disappeared behind the cloud cover. I can't speak to whether it was silent as I had my ear pods in and had the music really loud, but if I jog my memory, I think it had very minimal windows and was long in the body (but not as long as a 737, etc). There were no lights on it. It was so out of the ordinary that I stopped, watched, and then immediately thought of the "not drones" and other ways in which our ET friends can appear and thought I would bring it up here. I've done some google searches trying to find pictures of a plane with a 'weird, zig zag tail' but nothing is coming up.

Anyway, there's my story for the weekend.
Sounds like a friend! I hope you see more, I am sure you will!! :D