The Encyclopedia of Interactive Performance

When reflecting on scene work or exercises, one person’s observation is sometimes followed by several others chiming in with the same observation stated in different words. This process of voiced agreement eats up precious time. A more efficient way to indicate agreement is with a nodding fist.

This is how it works: When people want to agree with something that is being said, they “nod” their fist, much like a person might nod their head. In this way, agreement is communicated to the group without taking up additional time by repeating something that has already been said.