Dark object silently flying overhead in the night sky

I was just out in my driveway having a smoke looking at the stars when I noticed a dark object that was hang glider shaped but as big as a small airplane fly quickly over the tall trees in my backyard and over my garage.  It was completely silent and blacked out. No lights on whatsoever.  It was erie seeing this thing fly over silently and quickly.  It was maybe only 150 feet up because the trees in my backyard are around 100 feet tall.  Sky is totally clear tonight and I work in aerospace so I'm familiar with known aircraft and regulations. And no big hills for hang gliding around this area.  Possibly a totally silent  drone?  It was too fast and dark to get a picture.  Flew in a NW to SE direction, almost the exact same flight path I have witnessed a red fireball silently fly over a month or so ago.