This started as a generic Batman pose, but I couldn’t figure out what the hell he ought to be doing in that position. In the end it reminded me of a guy I saw playing dice in downtown San Francisco yesterday morning, so there you go.
You can tell Killer Croc is about to lose his shirt (if he had one). This is also the first actual appearance of Robin in these drawings. Finally! Took you long enough to join the party, you little jerk.