I'm not a dreamer, believing in alien visits, but can anyone tell me what i just saw? during my flight from prague to amsterdam i noticed something comming up vertical and then hanging almost still, then it start moving. at first of looked like a diesel plane, because of the black stripe, but then i thought about a burning airplane. from one moment to another it dissepeared. of course the video is very unclear, but still, can anyone give a explaination?