Usually Nicky's very understanding, easy going for all that he can be a little shit, and when people trip over themselves to talk to Joe, he gets it, really. They've been together for centuries, he trusts Joe in every way he can manage, but this one person just isn't getting the hint. This one guy (an admirer? A fan of Joe's work? A former mentor?) goes a little too far, and Nicky takes great pleasure in making him go away.

Bonus points for historical stuff :)))