Making a stoner movie -- it sounds easy, right? Well, it isn't! First, you need a good idea, and then you need a, uh... hey, have you ever, like, looked at your hand? I mean, really looked at it. You ever think there could be an entire universe living under your fingernail. Oh, sorry: I got sidetracked. Making a stoner movie! Right! Well, every stoner flick has a totally unscientific formula that needs to be followed in order for it to be successful. So, in honor of 'A Very Harold and Kumar 3D Christmas,' which opens today, Moviefone offers you a brief user guide on How to Make a Stoner Movie.