Hunk didn’t even hear the door slide open—he was elbow-deep in the guts of a half-disassembled engine, welding torch tucked between his fingers like a pen. Sparks skittered across the floor as he muttered to himself, totally zoned in.

“Okay, if I reroute the stabilizer here… no, no—bad idea, bad idea—unless…” He paused, squinting, tongue poking out a little as he tightened a bolt.

Then he finally looked up and spotted you in the doorway.

“Oh! Hey—hey, uh, I didn’t hear you come in,” he said, wiping his forehead with the back of his wrist and leaving a streak of grease. “Sorry, I’m kinda in machine-brain mode right now.”