Ingrid and Carolien look very sharp in their riding outfits. We decide that they would look even better in locking metal collars. The sisters obediently collar each other. But then we add a long metal bar to their collars, keeping the sisters at a healthy distance from each other, as well as handcuffing their wrists above the bar. They start pushing each other, trying to figure out a way to escape. After a while we toss them the handcuff keys, but the collar bar remains, and there's nothing they can do...