Low flying orange ball flies over Seoul, disappearsTraveling north on the Banpo Bridge, I saw this orange semi flickering light no more than 1000 ft. in the air traveling southbound. There is a lot of helicopter activity in the area from the US military Garrison in the area so at first I thought it was just a helicopter. And it was coming from the direction of the base. But as it got closer all I could see was this orange ball of light, no red or blue flashing lights or shape of the craft, just this orange ball with no sound.It was pretty big and low and passed right over the bridge. I am sure other people saw it in their cars. I wanted to stop but there was no where to stop. I watched it come right me while trying to not crash my bike. I watched it until it was right above me. I tried to find it in my review mirrors but I couldn't find it.I've seen many helicopters flying around the area. Flying that low you can hear them, and you can make out a shape and you can see their flying lights. I don't think it was one of those Asian lanterns, it was moving too fast, and my 6 years of living here, I've never seen one. I am convinced it was neither a helicopter or a lantern.