Cat defies gravity Source/credit: pedroburon What am I looking at? This physical optical illusion is caused by a reflection. The cat is sitting on the left side of the glass door, while the box is placed on the right side of the door. The reflection perfectly places the cat in the box. More optical illusions:Tippy toesSeparationFloor Color Creates Extra DimensionGiant CatGoofy TreeMisbehaving ShadowA Giant on the BeachBroken Chair