No, Jim's absolutely right, and Finn's a little relieved that he says it. Finn can't talk his way out of a paper bag and knows this.

But just as he's about to agree, Jim just... walks over there. Yeah, he's acting like he owns the place and is doing a good job of it, but that doesn't change that Finn's heart is now in his throat. All of this is also why he's not the one that does the talking, though.

But, right, okay, yeah, here we go. After a beat of panic, Finn takes a deep breath and follows, focusing on the task at hand instead of the possibility of getting caught. His eyes are on the lock and hinges of the door, but the thing looks pretty secure.

... There is a keyhole, though.