if you hold the jump button after using a wind charge you will continue to get fall damage multiple times. The amount of times you will get damaged changes the faster you fall (if you just do it, you will either get damaged 2 or rarely 3 times, but if you do it as I do in the attached video you can get damaged even 4 times). It of course only happens if you will get fall damage from the fall, by either using many wind charges or just falling enough blocks below the place you used the wind charge at.