What do cats do when there are no squirrels around?

This is Magellan's box, full of ripped packing tissue.

Darwin prefers the rocking chair, and pressing against the cat pillow.

What these pictures, taken by my husband, mean, is that tonight, roughly around 11 p.m. or so, when we collapse exhausted onto our bed, Magellan and Darwin will be chasing each other and roaring through the small apartment, like an approaching herd of wild horses.

I say let sleeping cats lie!