It appeared like a satelite moving across the sky, stopped, did a "S" then streak off at 90 degrees.

I took my dog outside as usual for the night. As I was sitting on my back deck waiting, I saw a shooting star out of the corner of my eyes. The sky was extremly clear and I could see more stars than usual. As I watched the sky, I noticed what appeared to be a satelite moving North to South. It did not dawn on me at the time that satelites do not normally move North to South. I watched it move across the sky and was following its path. When it reached 12:00, or directly over head, it stopped. I was floored. I have seen many satelites travel across the sky, so I knew this was not normal. It stayed motion less for about 5 seconds, then it move in the same direction quickly in a "S" pattern and stopped at approximately 11:00 O clock. Again it stayed motion less for approximately 5 seconds, then streak west to east and out of sight in approximately 1 second. I am a private pilot who has flown many nights and have seen many satelites. This event leaves me with no reasonable idea what this was. It was not a weather balloon, laser, plane, cloud, meteor, or satelite. I was awake, not tired, no stress, not intoxicated, or under the influence of any medication. It appeared first like a star, when I realized it was moving I thought it was a satelite. It did not grow in size or get brighter. It stayed constent in appearance and brightness. It defied all logic and Physics. I have read simular stories of this pattern, and have always thought that people eyes were playing tricks, or they wanted to see a UFO so bad that they saw what they wanted. I was not looking for this event. Am not a UFO buff. But this event has changed my thinking. I was totaly amazed.