Last night, approx 11:00pm. Prague, Czech Republic. Facing due East (from 5th floor balcony). Clear night minus lots of light pollution. What was this? No blinkers. Low in horizon. Brighter than any star. Moving fast. It seems to slow down and speed up at some points. It seems to dip a bit and go up a bit. As soon as i ended recording it banked very sharply and went out of sight quickly (approx 5 seconds or so). I assume it turned sharply to the East directly away from my position and went st...