Sorry, from the Xbox 360 board, and I was wondering if you already knew about this Easter Egg.
Start up the Little Resistance level (2nd Level), and after the boat crashes, call the Air Strike on the location it specifies. Run up to the beach, and head towards the right. Once you reach the right side of the beach, you should find a small puddle. Stand in it for a second or two. Now start heading towards the middle of the beach. You should find another puddle (though smaller), and stand in that one too. Now head towards the far left side of the beach, and stand in the puddle over there in the barb wire, while looking towards the mainland (the trees and everything ahead of you, opposite the ocean). After about 5-10 seconds, the screen will begin shaking, and weird voices will begin playing (similar to the voice in Shadow of the Colussus), and four lion statues will rise out of the ground with Ray Guns in their mouths.
Also, I'm sure you can already get the Ray Gun anyways, with the console commands, but this is a cool Easter Egg anyways.
"What's a ORLY? Sounds like some sort of mint chewing gum..." -Kiai Ko GT: Dragon 422The Official MLG Dragon