And there's guilt all over Jack's face, anyone could see that. Sinclair's expression is some just short of frustration, something a little more on the distressed side when he speaks.

"Kid, I was-- you were dead. You died in that bathysphere. I think that warrants some sort of honest explanation, don't you?"

He's not exactly pleading, but at least this time he's not asking purely out of intrusiveness. After all, the image is still fresh in his mind, and the lingering sourness of guilt. As much as he always hates being in the dark about anything, this time it might make the difference between escape and imprisonment. This time, he might actually need to know.