This occurred around 2021 in Laramie Wyoming one summer/fall night.
I was with my friends helping one of them out while my other friend Eddie and my dog went outside to grab a few parts to bring inside. While we were walking around from the shed back to the garage we looked up and just noticed something fly overhead. The night was clear with little to no light pollution.
The craft that I saw fly overhead as I recall it was really low, almost as if it were barely above the light poles and buildings. But it moved so fast out of our field of view that it was hard to process. From where we stood you could see for about 10 miles or more. Most of the silhouette from the bottom was black but triangular in shape. More of an Isosceles triangle. The back end was shaped like a diamond with 4 distinct blue flames coming from the back diamond area. The entire craft was silent and we couldn't feel anything despite being directly underneath it as it passed. I recall looking at Eddie and asking him if he saw that, he responded what was that.
I'm a mechanic by trade and found it to be very unique. I've never seen anything like this in the sky that I personally could recall prior to that night. I recently found this website and wanted to report my story, thank you.