I've had two therapists in the past try to get me angry to work on expressing anger. With one of them it was the first time I saw her, and I think it was a part of a style of therapy she practices. I didn't go back.

With the other, he did it after he had gotten to know me, so probably thought I needed to express anger more, or differently. He said something that was pretty explicitly mean/critical. I disagreed with him a bit immediately, but it didn't hit me that it really hurt, since I trusted him a lot, until after I left the session. After I responded to his remark, he said, I can imagine you getting really angry, learning1 (or something like that). It sounded like he wanted me to be able to express it more forcefully. I had to stop seeing him for another reason soon after this.

Anyone have any ideas how do you work on something like this? I am aware of feeling angry about things sometimes, but I don't know how I can practice expressing it. I don't suppose practicing on supervisors at work would be a good idea