The little assistance actually falters for a moment, as Jack's hand wavers away from and then back to Sinclair.

It hadn't occurred to him, really, that he's been basically doing everything he's told for the last however long. It's habit, it's instinct, it's what he's been doing ever since he arrived down here. Follow the arrow, complete the objective.

Thanks, Sinclair, for bringing to his attention that he's never really stopped taking orders.

Jack licks his lips nervously. He's choosing to help, he reminds himself, like a mantra. Because it'll be worth his time, not because someone told him to or spoke a few particular words.

"It's... no trouble."