Reply #8: thanks trof

[Skittles]

here's my bf's comment: The last guy put up what we called a "rooster tail." It depended on your wingspan how low you had to fly because it happened when your wingtip vortices met. In the F-4 you had to be below 36'. it only worked over the water or over the desert. #2 flew lower.

I have to say - when I was 19, 20 and working with USAF pilots processing their paperwork - what a cool mixture of intelligence, bravado and almost childlike sense of fun and daredevil they had. :D