One of them out-and-out screamed, the other gave an inarticulate cry, dropped what he was working on, and reached into the pocket of his jacket. I waited until he had the gun out so he'd feel better, and a few seconds later the other one was also holding a weapon of some sort, both weapons being pointed generally in my direction.
"Good evening," I said pleasantly. "May I help you gentlemen with something?"
The one with the beard said, "Who the fuck are you?"
"I live here," I said. "And you?"