Unlike humans, most mammals don’t have collarbones or enormous huge-headed-baby bearing hips, so they can fit through any hole thier heads can, with some wiggling. The inside of a pool table is hollow with a slanted bottom, which is how the balls all end up at the return slot.
So it’s not that cats don’t obey physics, they obey physics and we got nerfed on the ‘fitting through small holes’ feat in exchange for our ‘freaky superintelligence’ feat.
