
And so easily done!
Maybe putting a few steps here:
1. Straight line in the proper width
2. Ocean Wave/Glas disortion/ripple
3. duplicate layer
4. top layer: slight motion blur roughly in flying direction
5. top layer: add emboss effects according to your light situation, play with it'S setttings to add some depth and volumina
5. lower layer: gaussian blur
6. playing with opacities
7. merge
8. Smudge Tool w. medium to low strenght: go over the trail in rotating movements to add some more depth, feather it's borders and brake up too synchronmous shapes
That's it more or less.