Domestic Creeps- Beans
The can of beans should have been cleaned out and recycled WEEKS ago. Instead is sat in the dark icebox, first growing inedible, then growing mold, until the little beans became sentient. Eyes formed first, then feet, and finally black, wiry hairs sprouted. The newly formed creatures were naturally benevolent, and their intentions were comparable to Brownies of Eastern Europe (beings who secretly help with household chores). Unfortunately due to their size and shape beans are not very successful, and their attempts at chores result in an even bigger mess.
Moral: rinse out your beans.