Tony's attention had been drifting between Jack and his project list up until that fist bit of useful skill- then his eyes snap back dark and focused and weighty. The full bore of his mind settling on Jack and taking in the details. Face, hands, fingers- the hands of someone that's scuffed around and cut up from wires and wirework and the rest of what comes out of his mouth?

Super useful.

"You're my new wiring gremlin."