Steve steps back when the door begins to open, a little tense despite the fact that he's positive that Diarmuid is behind it. He was also expecting that some kind of alarm would trip because of it, but nothing seems to be happening... guess they lucked out. He's not gonna second guess it.

He walks inside and closes the door behind him, taking a quick look around the room he's in. Always important to note the surroundings after all. "Thanks."