The Air Hog zero gravity R/C car “contains a special system that works like a mini vacuum cleaner — a powerful fan creates suction to hold the car to the wall.” Video after the break. Click here for one more picture.
They run on rechargeable batteries and should run for about 10 minutes on a single charge. Keep in mind that the remote control is infrared, so it will only work when you have line-of-sight access to the car.