Rotating objects can appear stationary under strobe light, also they can appear to be counter-rotating. This second effect can occur in daylight, such as the apparent counter-rotation of wheels. Because of the illusion of counter-rotation in constant light, it is reasonable to assume that the eye views the world in a series of still images, and therefore the counter-rotation is a result of under-sampling (aliasing).
This theory has however received a strong counter-argument. A simple demonstration to disprove the idea is to view an apparent counter-rotation (that of a rotating drum) in mirror image. Subjective reports reveal that the counter-rotation appears in only one of the images (either the real or mirrored image when both are viewed simultaneously.)