Halt! Who goes there?
I've a friend who used to worry that if her mouth fell open while she slept, a spider might crawl across the ceiling AND JUMP INSIDE. Somewhere she'd read that over an average human lifetime we all eat a certain extraordinary number of insects of various varieties. And, well, they're tricky buggers those spiders. Who knows of what they're capable. Didn't they discover a little nest of them in some American kid's ear recently?
Anyway, I'm not so worried about spiders. Now I'm worried about a Polly falling on me while I sleep. Once the lights are out, it's a bit more difficult for her to judge distance on her way down from the top of the wardrobe. So I'll be lying there, there'll be some faint creaking noises as she adjusts her weight for the spring, and then... OOF! Polly bomb.
I said there was nothing good on TV.
Unfortunately she's also figured out that large boxes placed behind the main TV setup in the loungeroom to stop her getting to the tangled mess of wires behind (aka Cat Heaven), are in fact empty and fairly easy to push over. And that she can jump on top of the whole thing and down the back from there.
Fortunately, she's not in any way a naughty cat, so I have nothing to worry about.