I stepped out of my house to get some air at around 9:45PM and in the northern part of the sky I watched (and filmed) what appeared to be a drone performing acrobats. It was a fun spectacle and it actually got me slightly down as I thought to myself, 'Fifteen years ago and this was would have been completely mind-blowing - now everything unexplainable in the sky is probably just a drone.' After the object disappeared behind the buildings across the street and probably landed I went back inside for a moment to get a glass of water and then felt the urge to take one last look outside but the object had not returned. Then, right as I was going to retreat back indoors, I glanced straight upwards and just as I did, a large, black/dark grey triangle/boomerang shaped craft passed silently and swiftly DIRECTLY over my head. It had no running lights but there was enough ambient light pollution to illuminate it from the ground that I was able to clearly make out the shape. Now I've been following black triangle stories for decades and I never thought I would see one, let alone right outside of the home in the middle of urban sprawl Orange County. Ironically, my father had a similar sighting many years ago in New York City except he saw several of these things as opposed to the one I saw. I estimate the craft was about the size of a football field, flying between 500-1000ft off the deck and moving at about 200mph, traveling east to west. No lights and no noise but I was able to clearly observe it for about 4 seconds.