He's not precisely surprised when the Grunt ultimately shows up, not least of which because he's been making a fair amount of noise in the hopes that he'd attract one to his position anyway, but he's certainly willing to feign it as the admonition rings out through the room. His hands immediately go up in the universal sign of surrender (or at least, of HOLD UP BRO JUST CALM DOWN WILL YOU), and he straightens up to turn and face his would-be assailant with all the deference that an actually credible threat would warrant.

This'll be more fun if it doesn't immediately devolve into fisticuffs (Poke'cuffs?), anyway.

"Hey, hey, take it easy!" he offers back, aiming to sound legitimately startled. "Where the hell did you come from? Jesus, I thought for sure I swept this room like I was supposed to; what, are you a ninja or something?"