So I hear raised voices in the building so walk off to investigate & walk in on one of our researchers having a argument with a man & looking less than comfortable.
Me (to the man): Excuse me, could you please leave the building.
Him: This is none of your business
Me: What you're discussing very loudly isn't anyone business but yours. The thing is you're disturbing people in this very quiet building. So please leave
Him: I told you, this is none of your business, now go away.
Me: Okay, I'm TELLING you to leave this building and take your conversation were it is NOT disturbing people
Him: So why not tell this b**tch to leave as well
Me: SHE is an employee, you are not. She can leave with you or stay. But YOU are leaving
Him: Pi$$ off!
Me taking a step between them making me close to him and staring directly into his eyes unblinking: You are leaving right now! The question is do you walk out of the building or I physically throw you out. Are you clear on that?
Him takes half a step back into a wall looking a little worried: Okay!
Her very quietly, sounding a little shaken: Thanks.