Wow. As long as he keeps moving Jack feels like he could go on for hours, but if Sinclair's flagging then there's a conflict of interests here. Jack is struck by a sudden and awful premonition of having to hang around in one place for hours and guard Sinclair and he's a free spirit, man, you can't tie him down.

"...Can we try one more time?"

Still bad at saying no. Still even worse at sitting patiently when he wants to be off doing something.