Some stray folders are being dangled by Ianto's ear.

Given Jack's general dramatic and flamboyant nature, it probably isn't right that he's that good at sneaking up on people. But then, as noted, it's probably that Ianto was distracted.

Whatever the reason, Jack's grinning, pleased with himself.

"Another one done with that I never have to see again," he says cheerily. "Hide it away for me?"