Those scans are awesome. Jason certainly has a history of dragging himself, injuries and all, to save the day. He does the same in The Cult.
He did something similar earlier, actually, in The Search For Ray Palmer when the Challengers were in the world with vampire!Batman. But it's true that they were out of time and had to change worlds. As for Jay saying screw-you-guys by the end of Countdown, I always thought that it was a reaction to seeing Earth-51 Batman get killed after Jason had been the one insisting that they go out and fight - to help his friends.