From Remodelista Plywood cabinets In Japan, mA-style Architects designed a double-layered house where the exterior layer is used as a zone for closets and storage. Photograph by Kai Nakamura via mA-style Architects.
This element of design is Negative Space. The hand isn't actually holding anything. It implies that there is a light bulb in the empty space. Negative space guides your imagination to finish the image.