Leopard Dock Shadows

Every dock icon automatically gets a cast shadow that is in perspective with the dock when it’s positioned at the bottom of the screen. But hang on. I just noticed something kinda weird. They also have a drop shadow that is projected behind them so they stand out from the background. Is someone going a little nutty with Photoshop here?

I mean, now there’s a reflection of the icon, a cast perspective shadow, a drop shadow from the front, and the see through quality of the shelf?