oh he gave u a lil red badge of honor! congrats!
i think both the musking and bites/strikes were defensive and not aggression. the musking esp. makes me think he got scared, startled or wanted back in a safe space (enclosure)/left alone. maybe he was thrown off by your SO, maybe it was a sudden movement or approach; maybe Klauss forgot where he was and who he was with. i'm sure he will get better and chill out w/ regularity and routines.