It covered half the sky in just three seconds, stopped, did a half circle and faded to nothing.It looked like a satelite but moved across the sky from north to south much faster. It covered half the sky in about three to four seconds, then stopped for about a second, then did a half circle and then faded to nothing. I have never believed in UFO sightings and have never witnessed anything like this. It made the hair on the back of my neck stand up. I just hope someone else saw it as well.