"Look, you explained, and I forgive you for it-- but yeah, time before, throwing me off a building? You were entirely acting on your own then." While in a general things-people-can-do sense, of course John could have done that... but then he's John. Count on him to make the ass-saving move instead of the noble one; Jack didn't really expect better. Still, it was surprising that John did the (however little) good that he did do.