You dog.

It would appear that the Great Blue Heron wasn't going off to inform his superiors about Rabbit's capture of Mark.  Instead, he had to find a witness to the capture so that when he does stand before his superiors to deliver the news of Mark's capture they'll actually believe him.  (What can I say?  Just as the Galactic Empire wasn't built on sunshine, rainbows, and puppies, the Avian Empire was not built on trust, cooperation, and taking the fall for your own mistakes.)

So this is Rabbit's plan?  He's going to put Mark on a boat, manned by a guy named Salty (who seems to be carrying the back of a chair around), and sail him out of the swamp?  At least, I think that he's going to sail him out of everyone's hair and not just sail him out to shark infested waters and throw him overboard.  I hope that Rabbit realizes that Mark will just come back, be it on the boat, or riding on the back of a turtle or a shark.  I'm not sure that I'd peg all of my hopes for getting rid of a foe on a guy named Salty, but I suppose if my name was Rabbit, it might make perfect sense.  (And who's the guy in the shirt lifting the cement block?  Lemon?  Sour?  Lifty?)

And yet, through it all, through everything that has happened, and is threatening to happen, I'm still not convinced that there's any great danger here.  For all of the guns and dangerous looking characters, I think I would feel that Mark was in actual danger if it didn't look like he was just shrugging and saying, "Aw shucks," or taking a leisurely stroll, throughout this entire strip.