Unicron, I think that I saw an Unidentified Flying Object once. Or, in fact, I did - because I wasn\'t able to identify it. I am being serious here, so bear with me. ( Plus I have a couple of additional stories concerning extra terrestrial phomenon / experiences )
In the winter of 1991 my father woke up to find my bed empty. I hadn\'t disappeared - I had sleep-walked to the living-room, and slept on the floor. Or at least so it seemed at first. That evening we warmed the Sauna. While in the Sauna, my father made an intriguing discovery - in both my right arm and leg there were three perfectly triangular markings. He, being a very UFO-enthusiastic person, thought I had been abducted. The mystery surrounding those markings has remained unanswered to this day.
Next phomenon, my first UFO-sighting happened when our family was enjoying a vacation in Lanzarote, an island in Greece, back in \'93. We were living in a very nice hotel - I found the stairways to be intriguing and worthy of exploring. One day I returned from a staircase-adventure to witness my father standing still in the balcony, watching at something. He shouted me to come. My little-sister followed. My mother was somewhere - holding our one and only camera. The object my father was following with his eyes was nothing sort of amazing. A black object, as if made out of three perfect balls, hovered near our hotel. It made no sound, and it seemed as if there was a force-field of a kind surrounding it. Suddenly it started to move against a high-speed wind - to the right from our point-of-view. I quickly checked the balconies next to ours, and I saw many people standing still, jaws wide open, pointing at the object. So we weren\'t the only witnesses. I will never forget that day.
A year later our family moved from a small village to the countryside, inhabited by about 200 people - mostly our relatives. I got a couple of new friends, and boy, did we have adventures that one winter! The winter of \'94 was perhaps the most mysterious period in my life. One dark evening me and my friends were having a snow-fight outside the house. Suddenly, before we even noticed, a comet-like, huge object passed over us. The object seemed to be near the tree-tops. But before we got the chance to chase the object, it continued it\'s journey with a velocity like no other. It disappeared in about a second to the horizon. We were spell-bound, dazzled, paralyzed. For a couple of minutes - or a period that seemed long - we just stood there and looked at the spot where the object had been. I\'m not sure whether it was an illusion, a comet of a kind, or UFO - but at least we three agreed that it wasn\'t explainable, illusion or not. Given that I was only 8, it might\'ve been generated by my imagination. Yet I still believe that it wasn\'t, as mass-hallusination is very rare.
Later that winter I witnessed at least two unexplainable objects - but as I can not remember those sightings well, I will not try to describe them in detail.
But I am sure that we are not alone.