I am occasionally impressed by Nina's ability to stick to glass surfaces, but then I remember 1) all the hard-water buildup probably makes the glass a bit rougher and easier to stick to than I'm thinking it is, and 2) I bet if I only weighed three grams (0.1 oz), I'd stick to lots of stuff too.
The lid is not normally open on the cage; I opened it for the picture because I can't get good pictures through the screen. I don't get good pictures without the screen either, but try to ignore that.
(Side note: if you are one of the many, many people to whom I owe e-mail currently, I am very sorry. Don't hold your breath.)