Stair Slide Source/credit: aggieismybestfriend What am I looking at? This stair slide is surely the fastest way to get downstairs! The diagonal lines created by the cable railing created this optical illusion. More optical illusions:Goofy TreeSunken YachtMissing pixelsAerial View of a BeachStretchy CatThe eye of the towerPuffy FaceFootprint in the sand