Where's a gap, there's... Mr. Gap. Obvious enough.

Just like now, his hand darted out of the vent in the floor to grab you by the ankle, startling you.

"אותי מצחיק אתה מצחיק,לתת אצבע?"
("Me funny, you scared?")

He asks amused, his eye squinting as he grins from the darkness, waiting for the answer.

Really, not a single day of peace near his presence. Not that it's bad, he's quite harmless. And you're still not sure if he understands your language or he's just playing with you by giving vague answers.