This exercise requires no preparation, and actors feel no fear participating in this exercise because they are told ahead of time that it is very difficult to successfully complete. This exercise demonstrates on how we are not always in full control of our own bodies, and that our movements are often much mechanized.
Ask participants to waive a right hand in a circle gesture and repeat several times; the size of the circle does not matter. Everybody does it with ease and is asked to stop.
Participants are asked to move a left hand in a cross gesture and repeat. Everyone does easily and is asked to stop.
The group is then asked to describe both the circle and the cross at the same time with both hands simultaneously. It is virtually impossible. Only one or two in the group will succeed.