So do I have this straight...this was done in a professional, office-type setting -- employee #2 interrupted employee #1 with a work-related question -- employee #1 was peeved with being bothered by employee #2 -- employee #1 ran her big mouth in what seemed to be a playfully-demeaning manner and cursed at employee #2 -- employee #2 walked away shocked and embarrassed -- you witnessed it and that leads us here...was I right?
Honestly the nature of the two employee's personal relationship - which I'm figuring is nil - doesn't even matter to me. This is total, utter, stupid, offensive behavior.
May I ask if your company has rules against swearing, profane or offensive language, or disrespectful conduct?
I once had an upset co-worker walk pass me from another dept confronting/cursing me due to discrepancies I found auditing her work (it was my job to do so, but of course, she didn't want points and was trying to force me to accept her grading schemes). About that time I calmly stated that if she had a problem with me she needed to go talk to the honcho himself and get out of my face.
Ended up she was no longer allowed to approach, come into my building, or within so many ft of me. She (and her cronies) hated me, but I. could've. cared. less. 
Lesson learned; never let what others do or say catch you off-guard and always nip this behavior in the bud - right away.
Honestly the nature of the two employee's personal relationship - which I'm figuring is nil - doesn't even matter to me. This is total, utter, stupid, offensive behavior.

May I ask if your company has rules against swearing, profane or offensive language, or disrespectful conduct?
I once had an upset co-worker walk pass me from another dept confronting/cursing me due to discrepancies I found auditing her work (it was my job to do so, but of course, she didn't want points and was trying to force me to accept her grading schemes). About that time I calmly stated that if she had a problem with me she needed to go talk to the honcho himself and get out of my face.
Ended up she was no longer allowed to approach, come into my building, or within so many ft of me. She (and her cronies) hated me, but I. could've. cared. less. 
Lesson learned; never let what others do or say catch you off-guard and always nip this behavior in the bud - right away.
In my work environment I would think nothing of this. If anything that would be a tame comment. Then again we are all pretty close and very playful with each other. I prolly would've come back with something like "Blow it out your a-s b-tch. At least I'm DOING some work." And made some crazy face. 



and to them that would not be witty but humiliating and embarrassing and