To be in high dudgeon is to be with resentment, angrily or furiously, but the context describes the man in the red pyjamas being calm and level-headed
Context: Man in the red pyjamas slammed the door of his room after shouting to his wife in a calm and level-headed manner.
Hypothesis: Man in the red pyjamas slammed the door of his room after shouting to his wife in high dudgeon.

Is the hypothesis incorrect? (Yes, no, or unknown)?