... the walls are transparent. So if you want to help the fly escape you first have to convince the fly that it's in a bottle, and only then can it find its way out.
That is taken from This American Life episode 635 called "Chip In My Brain". Find it online or the podcast on your podcast app and put it ever so gently in your ear hole. You'll thank me for it later. It's quite the story and sheds light on our experiences too.