I remember driving on a freeway from a small Estonian city named Rapla towards Tallinn. At some point I noticed a glowing sky, it was moon shining on the clouds and since the pattern was right, it looked spectacular. I had my camera with me so I pulled off the main road and stopped to take a shot. I didn't have a tripod so I balanced the camera on the roof of my car. It was not easy and comfortable but it works.
Here is the shot.
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From @greddyforce