I am a chef so i finish work quite late and i like to go for a walk with my dog after a busy day in the kitchen to wind down and de-stress. i was roughly 300 to 400 meters from home when what i thought was a dim shooting star caught my attention. as i started to watch the "shooting star" it suddenly and very abruptly changed directions by 90 degrees without slowing at all. now this had my full attention! as i continued to watch this strange event it continued to instantly change directions every 5 to 10 seconds never slowing down once. as i watched i could faintly make out it was either boomerang shaped or delta shaped but it was dark/dim to the eye it almost looked as if it were cloaked almost like the predators cloaking device in the predator films. it also looked as if it made ripples in the air similar to a boats wake in water. i did see lights on the under side of the craft but they were very dim almost shrouded and i am quite surprised that they even caught my eye in the first place if i'm completely honest. it is quite difficult to say exactly how high it was but it was quite high up so it must have been of significant size! i watched this thing dart back and forth across the eastern sky for about a minute to a minute and a half as it weaved its way to the south until i lost sight of it. i really would like to know what i have just witnessed because it was the coolest thing i have seen in a very long time