High-low heckle

This one might look competitive, but it's not. The point is to be a friendly opponent, to heckle your partner's balance through arm and leg. Your movements will be nudges. Don't try to win. Instead try to provide a bit of surprise and stimulation. Give your partner something to work with. Of course, you'll be working hard just as it is to stay on one foot, so do what you can. This game can be subtle and meditative or more powerful and robust.