I actually never thought of using empty chair to release anger. Empty chair is used for a lot of stuff, for example, to talk to people from your past that you can no longer talk face to face with, such as those who have died or who are no longer part of your life for some other reason, or people with whom you are unable to communicate, perhaps due to a dysfunctional relationship. It lets you tell them what you wished you could have told them "back then", which could include feelings of love, anger, tenderness, sadness, etc. You can also use it to talk to some of your other ego states.

My T has said he sometimes has clients release anger by pounding into a pillow they hold. But he said, "obviously that won't work with you," lol. I think I am of a certain client type that can't express anger that way and he knows it. It would be very unauthentic if I did it and just make me feel silly. I do think I might be able to use empty chair, though, to express anger. Maybe I should tell him that. Hmmmm...