[sblock=Ngikhnit, Pendrake, Quozen]While the others throw themselves against the door and bounce off, Quozen tries to take a vertical route out, but cannot quite get a good grip on the post.
OOG: climbing the post would be DC 15; it's 20 feet to the top. Since he needs his hands free to climb, does he drop the oar? or tuck it across his back?[/sblock][sblock=Walking Dad]OOG: Midias could not move onto the roof (which might have led to him falling through anyway) - the roof square in front of the ladder is a Ngikhnit-shaped hole.
There is a rule that "you may not withdraw using a form of movement for which you don't have a listed speed." After a bit of rules checking, I think you do Climb a ladder (in the sense that the skill is used, whereas you do not for instance need a Climb check to climb stairs). The DC to climb a rope ladder is 0; the DC to climb a regular solid ladder is not stated anywhere I can see, but it must be trivially easy, perhaps DC -5. If that is so, then Midias cannot withdraw, so would provoke an AoO for starting to climb down.
If Midias jumps off, he will still provoke an AoO for leaving a threatened square. He would fall 10 feet or so, so will risk 1d6 nonlethal damage, which can be avoided by a DC 15 Jump check. He will land prone ("If you attempt a Jump check untrained, you land prone unless you beat the DC by 5 or more").[/sblock]