The amount of detail in this game is simply too much to comprehend, especially considering the polish with which everything is animated and how layered and rich the sound design is.
I would say "that's what happens when you have a budget bigger than Avatar," but that would be an insult to the craft on display here. Any other developer could have had the same budget and not made something anywhere near as gills-packed with all of these little details that add so much to the experience.
You had me at flip-flops flopping, Rockstar.