In reply to predators explanation…. now I can accept the special effects version but an its a big but when you try to lay on us super sonic speed I really have to go back to my theory of a stick vibrating an I understand being criticised for lack of maintenance might upset some people but SUPERSONIC SPEED ….. really? WE at top gun flight school study aeronautical engineering as a first step to flying so frogs can fly an know a lot an that is why DAVE is now a student of TGFS …………………just say’n