Silas was more than willing to bullshit about who he'd fight and how that fight would go, or talk rough numbers and the like where combatants were concerned, but he wasn't the type to joke about civilian lives, even with his more monetary focused work ethic. He'd spent too long as a defender of the peace to ignore shots taken at innocents, and had been known to react violently to stray shots injuring people in the crowd, if you can call firing high explosive rounds into people's genitals a violent reaction.
He turned to regard the assassin, trying to decide if they were serious or not, his expression mostly unreadable behind that helmet's faceplate. Something about his demeanor had changed, as if tension had eased into his spine almost unnoticed, and he was coiled like a spring, ready to explode into motion at a moment's notice. A quiet menace exuded from him as he geared up mentally for the coming fight, which wasn't long off at all now. He expected the early arrivals to appear any minute now.
"Make sure you survive this encounter, eh? I'd hate to get stiffed out of my fight later on just because you didn't keep your head down."
A look of defeat crossed Bo's shoulders as she slumped slightly and muttered, "Whatever." It was hard to tell just what had happened in Norrington's brain, but it was something.