What Blake is doing around the corner is completing a preventative measure. He's just closed the breathing apparatus over his nose and mouth, and the first breath out and then in is tentative. Nothing adverse seems to happen — he counts himself fortunate in this case — so he turns on his heel to face down the hallway, that toy in hand.

Are you out there Crane? He's looking for you, his dark eyes narrowed, his heart pumping fast. Anything he has to do to get this dialogue started. C'mon, he's ready to start tossing insults right now, in no mood to fool around.