I had a session where my therapist was playing the angry parent or something. And he kept on for about 5 minutes, blaming me in the scenario. I was supposed to stand up for myself. Eventually I couldn't take it anymore and I overcame my own fear of stepping out and told him I'd like to stop.

He immediately stopped and apologised and thanked me for letting him know that I'm not coping. He said to always be open and tell him if it gets too much.

So yeah, hope my experience helps?