It's almost baffling how seriously people treat Roshambo or RPS. There is an actual world championship if you can believe that? But mind you it's mostly in good fun. But still ... there are strategies? Which is amusing in itself. How can you strategize something that is complete random chance? I'm thinking it's all about psych'ing your opponent ... and .. I guess .. luck ...
Tell you what though: If you're impressed that there's an official site for RPS, you may also like this - Here are the official rules for Shotgun. Yes, apparently there is a whole science to the art of calling for the front passenger seat
http://www.theshotgunrules.com/