I am a person with not many emotions going on inside of me so I did not get into situation where I would get angry or cry or something like that in therapy (YET). But we are working on getting in touch with these and letting them out so I am sure it will happen.
For that case my T has a boxing bag in her office (she is also body therapist so there is gym stuff like exercise ball, mat etc.) She said that pillows are not enough for some people as they like to feel more resistance when hitting something.
She actually encourages people to express emotions which includes anger of course. She lets clients scream and hit stuff and you know pretty much have a huge temper tantrum right there. She just would not allow clients to direct it at her so no verbal or physical anger is allowed to her personally outside of usual respectful contact between adults.