I took this photo on christmas eve, here in turkey. Two UH-1H's were flying by the second was about 150 ft away from the first, than the second began doing some wierd thing where he spun just a bit and dived for 200 or so feet, must of lost control for a sec The first one is the one with the arrow pointing at it:
Well if it is like many of the H-1 pilots I have ridden with in my mis-spent youth. It is a manuver that is exicuted right after the words "Well then, Lets make the photographer sicker!!!" are said.