Flutter Wheel
 

From facing couples:

   The dancer on the right (usually the lady) steps forward
to meet the opposite dancer with a right forearm grip
and begins a full turn to return to her original position.

The dancer on the left (usually a man) will follow
his partner after she passes, taking the hand of the
other lady as she catches up and leading her to her home.

   If the left hand dancer waits until the center pivot has turned
half before he moves ("Grab that guy and drag him home")
 the result may be to pull the arm of the active lady backward
which is uncomfortable and  much less smooth.