This happened shortly after I graduated high school back in the late 90s. It was during the summer, so I hadn’t yet started college, and I didn’t have a job just yet either. This left me bored with a lot of time on my hands.
It was during the afternoon, and the sun was high in the sky; not a single cloud in the sky. At the time, I was the only one home, and I was out in my backyard getting some work done around the house. I forget what I was doing exactly, but that’s when I noticed this large shadow zip across my yard in a diagonal direction.