Metallic disc-shaped UFO spotted in Los Angeles

On April 22, 2016, in the evening, an inhabitant of Los Angeles (California) has certified to have seen a metallic disc-shaped UFO floating in the sky. Unfortunately, witness has not caught photo or video.

Witness statement:

I was walking home from the grocery store at approximately 7:05pm. It was still light out. I looked up and saw what I assumed was a stray mylar balloon at first, maybe 5 feet in diameter at a height a bit above the palm trees on my street. As I watched it, I noticed a bright greenish-blue light that seemed to radiate from the side of it. This made me keep watching. The object spun slowly and also wobbled but never tumbled in the sky. An orange light also flashed periodically. It floated over my head and then over the buildings on the other street and I watched it until it was out of view. I'm not 100% convinced that this was not a balloon because it looked weightless in the air and the metallic nature of a mylar balloon could explain the lights as merely reflections, but the constant spinning and the color of the lights make me wonder if it was something else.

Photo: Hollywood Boulevard (Diliff / Wikimedia) - CC BY-SA 3.0