This escape- he first, managed to open the bedroom door. Then, proceeded to take the folding screen that we had in the window (the windows don't have real screens unfortunately), and, without a single foothold to support his weight, managed to bend the frame between the two halves of screen and slip out through them sideways.
We've decided that after we find him, we'll put a collar on him, then let him come and go as he pleases. Obviously, we can't keep him in, and he's smart enough to take care of himself. We just want a collar so people know that he's owned. And we want to make sure he's neutered ASAP so that we don't have little John Wilmot's running around. He already has a girlfriend.