I was at the St Paul/Minneapolis Airport driving back to the Freight house When I observed what I thought was a very low exhaust cloud from a aircraft, until it moved. It had a end trail as wide as the orb that came to a point that when it stopped the end trail was absorbed back in the round dark grey cloud. I thought to myself it was because I was moving so I used a point of reference by using the smoke stack that was on the left of the cloudy looking orb, as I looked at it. It continued to move left and right in short distances. I thought it maybe a blemish on my window or something in my eyes. Then It started to move from my right to left with a slight descent.It started to change shape while passing the smoke stack. The new shape looked a little like the 60's star trek badge, but laying a on it's side a bit. At this time I decided to stop and open my window. Making sure I had nothing to distort my pic. when I was able to get my phone out ,it moved behind a aircraft hanger before I could take a pic. Not to be seen again. This thing looked like it was trying to blend with the cloud cover we had today. If I weren't looking directly at it or took my eye off it, it would have not been noticed or seen. After seeing this I got on line as fast a I could and found a pic of it. In file 1 is not what I saw, but this is what I saw. I'm not sure what I was feeling. but I know I was freaked.