The Rambo Twins Out At The River

I was poking around The Dig the other day when I came around this big photo of the outdoors that someone blew up to like mucho grande size. I bought it for like a nickel because I thought that it might make a decent background for some action figure pics. It totally does huh? 

It looks like Rambo and his twin brother Jim are out at the river huh? I wonder what they are up to? Rafting? Hiking? Who can say. It looks like fun though right? I wonder why John brought his 50 cal. Though. Force of habit? And why is he holding it with his left?