Me and a group of friends had rented a caravan for the weekend in Bridlington, it was summer and a few of us were stood outside smoking. The others went inside and I stayed outside for a while looking at the stars and watching satellites arc across the sky. One of the 'satellites' I was watching suddenly stopped moving (which they can't do), some clouds briefly obscured it for a second or two as I carried on looking up (the clouds were moving fairly fast that night). I then noticed it had started moving in a 'wiggling' pattern across the sky and two other lights started 'wiggling' and weaving across the sky to join it. Once they had come together they formed a triangle formation, which then slowly rotated 360 degrees in the sky, before each of the lights darted off in opposite directions at extreme speed. To this day I genuinely cannot explain what I saw that night.