Have a base start on 1 knee with 2 fliers in front of him (you might want to also have an additional spotter to assist with getting the fliers up).  Have the fliers stand next to one another, wrap their arms around their back, and stick out their outside knee by standing on their toe (this way the base hand somewhere to place his hand).  On count have the fliers dip and jump, and have the base stand straight up by keep his arm straight.  Have the flier's pull their outside knee right after the jump and hit half Hi-V's for the finish.

NOTE: the spotter needs can stand behind or in front to assist with the stunt.  If he is behind then he will help toss up the girls and place them into place, and if he is in front then he will be a post up.