There's definitely a threshold between an I'm-thinking-about-what-you're-saying stare and a now-I'm-thinking-about-something-else stare and it's not really making Sinclair uncomfortable, but he's not exactly sure what to say now either.

Actually, he almost anticipated a fair amount of incredulity on Jack's expression, but that's not there either. It's just blank, nothing. He can't read it and that alone unsettles him a bit.

"You alright?"