See? They think "Doubt" is a comedy, too....

And, as it goes on, they get deeper (the Apatow-produced "Step Brothers," in which Rogen appears), and deeper (Franco as Scott Smith, in a romantic screen kiss with Harvey Milk), and deeper (Ram Jam!) and deeper (Janusz Kaminski) into the movies -- just like their characters do in "Pineapple Express" itself.