Diego manages to mostly contain the startled little jump when Five starts talking over his shoulder, and then rolls his eyes, straightening and turning to look at his brother. Glaring a little, he leans around Five and snatches up the screwdriver himself, shaking his head. Of course the little prick can't be bothered to help.

"Yes, I actually know what I'm doing. Did you miss the part where I live in a boiler room?"

Shifting in a little closer, he starts working with one of the pressure gauges, "What would you call my area of expertise then?"

He can guess, of course, but it's conversation.