Beneath the furniture, motes meet as clumps. Clumps coalesce into piles. The piles of dust receive motion from an eddy of stirred air. The tumbling piles re-form themselves, grow limbs and stubby antennae. Dust Bunnies.
The dust bunnies scamper in search of food. They graze in forgotten corners. They gather dust from between tangled computer cords. They feast on lint traps and unattended vacuum cleaners.
Have a face mask ready for when they strike. They will pounce at your mouth and nose, choking you with their matter. They will leave your moistness to decomposition and the roaches. They will paw the dry remains for more material.