there was something about the way that the original shot was lit and the background that made it look like a bit of old 'stock' footage from a 60's monster movie inserted into the scene, it just looked like it was done quickly and added to the scene much later in the film-making process.
and judging by the shot it does look like they've toned some of the background colours down so that it fits better with the rest of the footage in the scene. although I'd really like to see a clip of the scene to get the full effect. not sold on the cat's eye though.