A balancing act is an activity that requires skill and concentration to maintain equilibrium. The term can be applied to a variety of activities, such as unicycling, handstands, symmetry, and zero-sum games. Unicycling is the act of riding a one-wheeled vehicle, while a handstand is an acrobatic move in which the body is held upside down with the hands supporting the body's weight. Symmetry is the property of having two halves that are mirror images of each other, and a zero-sum game is a situation in which the total gains and losses of all participants are equal.