Because the house is rotating to maximize your exposure to the sun! Check it out: this spinning home was built in 1903 for an exhibition in Paris. Basically it's just a regular house built on top of a turntable. The idea was that by rotating slowly throughout the day it would provide, "the sunlight needed to create a more healthful and sanitary home." It'd probably be so fun to live in, until the day when it started spinning out of control, and you and all of your belongings got plastered to the wall — like on one of those carnival rides where the room whirls around and the floors drop away.