Although I was furious, I remained calm.
How did you feel inside when you were acting calm?
I felt like screaming and lashing out.
It is good to control our emotions and act calmly, even if we are very upset.  We might act in a way that has consequences that we would regret later if we let our anger take over.
I wanted to break something but I was scared of the consequences.
It's really great you're able to recognize that in the moment, and stay in control. How do you express your angry emotions afterward? Do you journal, draw, or something else?