from looking at the big circle/ring shape you can see on the photo it looks like the photographer has zoomed in quite a bit.
He could have been sitting for e.g Seat 1A looking at the a/c as they passed it from left to right just as the 747 was about to fly through a wall of thin could (sorry dont know the technical name) But I suppose theres pleanty of explinations.
Shame really that ever since the introduction of p/shop that you often think is that real, nice shot tho!
John
