Classic disc shape flying about 100mph black on bottom metallic on top.

I am a United States Marine Corps 0311 infantry rifleman veteran. I was sitting on my back porch talking with my dad, girlfriend, and twin brother. I was looking across my yard and all of the sudden a classic upside-down bowl shaped craft caught my attention while it was flying across the sky. It was black on the bottom and the top half was what looked to be metallic and would reflect the sun very brightly because of an extreme wobble the craft had while flying. I watched it fly across the sky for about 12 seconds until I lost it behind a tree. I tried to get everyone's attention but only my twin looked. He didn't see it at first but the craft wobbling and reflecting the sun finally caught his eye. He saw it for about 3 seconds until it got hidden from veiw behind a tree. I did not feel afraid in anyway. I saw it clear as day and I know for a fact this is a UFO. This is the second one I've seen upclose in about a 7 month span. The first one was a day before Thanksgiving 2021 at dusk. I think they are observing me.