Left an obvious train that lasted at least.1.5 - 2min. The train appeared as a bellowing smoke trail not like that of a airplane more like the smoke that would come from an actual train engine that burned.coal. In other words it wasn't straight lines but a puffy trail. The train seemed to disappear faster in some spots along the train then others. Reminded me of a airplane running out of gas while it was releasing smoke. Some places it seemed to surge.