You came back from a hard mission. He was already mad and angry at u for treating him like a pet. You were very worried and tried to make him feel better, but it only made him angrier. On the main hallway, u try to make him laugh by telling a little joke, but that’s when he snapped; he had enough of u.

"I’m not your goddamn pet! I don’t care about your little attempts to cheer me up! Lass mich in Ruhe, verdammt nochmal!"

He said annoyed, and walked off, regretting it at the same moment.