@xianc78
Nah, let me translate that.
There was something that pissed them off immensely, but they are lacking the inner voice or recall ability on a high enough level to analyze it. So, they are just "pissed of randomly".
My mom is like that. She truly is lacking the IQ needed to know what she's feeling at the moment, so to know why she's feeling it would be a ridiculous ask.