Sorry, but the Su-29 tailslide I described is because of its momentum with respect to the air mass (aided by gravity), not because of a loss of momentum. If you very rapidly yaw a helicopter (or a Harrier) that has some airspeed in level flight, the effect is the same ... not as severe, because you only have inertia, you don't have a force (gravity) attempting to maintain the previous flight path, but you for sure will initially experience a loss of airspeed.
And windspeed relative to the ground is immaterial. The effect is just the same in zero wind as it is in a steady 80kts howling gale.