There is a principle in theatrical magic that "the audience will often remember or describe an exaggerated effect" – so the audience members may not notice the increased height caused by the "faked second shot" (if the additional height is not more than a few extra centimeters) when watching the combined footage later, believing that they are seeing a genuine recreation of the performance. This is even more likely if, during the original performance, cameras are positioned in the same place as those from which the "faked" footage was later shot.