For creating a more dynamic photo by flipping objects such as hair, tie, etc.
Take note of objects on the coser that can be flipped. Common examples are hair, cape, coat, tie. Get helpers to to flip or drop the objects just before you snap the photo. Do give the timing to helpers so that everyone can flip/drop together. Take note that objects tend to look better when they are falling.
For more tighter shots, it is easier for the helpers to jump away. But for wider shots, especially using wide angle lens, the best place for the helpers to jump is to the side of where the photographer is as illustrated in the picture below.
Most suitable time to use this technique is when you are outdoors or the subject is doing an action pose. If the photo is meant to show that the coser is in a confined area or being in a very static position, having the objects flying is
NOT recommended as it will spoil the original meaning of the photo.