Yes. Well. The topic of that thing shall be revisited momentarily, if Arthur's fleeting expression is any indication—and it's only fleeting because Eames is suddenly getting all up in his business over here. He's not going to hand over the instructions, but won't keep them from the guy, either.

"It's not like this is an indecipherable puzzle. A shelf's a shelf. I just don't wanna end up missing a step and having to disassemble the whole thing to go back and fix it." He's being so careful about this shelf, you don't even know. "And I hope you're not planning on turning those into food." See, back to the thing—and back to turning screws, too, as he kneels forward again.