Some people just don't get cult-following films. They usually feature either transvestites, extraterrestrials, people dancing badly, or on the odd occasion, as with Rocky Horror, all three. .
Now, the biggest mistake people make is that they think movies like Star Wars and Star Trek have cult followings. No. They have obsessive followings. .
What's great about movies like Rocky Horror is the fan base. These are people who lead normal lives, who have kids and families, but on those late-night showings like to dress up in bustiers, French maid uniforms and sequined bodices and yell lines and throw bread and Scott paper towels at the screen. In Grease, we see teens from the fifties displaying their upbringing: they can't dance and John Travolta sure as heck can't sing. In Blues Brothers, you get several instances proving that Dan Aykroyd is one of the best criminally evasive drivers out there and that you don't sing the blues in a honky tonk and get a welcome reception.
A good example? The basic premise of RHPS is that transvestite aliens (From the planet Transylvania) show two strait-laced kids how to party and have fun, with the aliens killing their leader at the end, their castle disappearing in many smoke-bombs and Meat Loaf playing a sax-swinging, lobotomied pizza-deliveryboy, bellowing out "Hot patootie, bless my soul, I really love that rock and roll.".
Yelling lines at the screen? There are times when you yell line back at the screen, especially in Rocky Horror. You may yell at the screen when the narrator comes on (these are referred to as "Neck Lines", as they are usually about the fact that the narrator has no neck that we can discern. "No Neck onscreen! That man has no fucking neck!") You hear the lines "Say goodbye to all of this, and hello to oblivion!!!!" You then yell "Hello, oblivion! How's the wife and kids?".
When Eddie is killed and served up as the main course at dinner, you yell out, "Anybody want a slice of meatloaf?" You may also yell various sexually-oriented profanities at the main characters Brad(Asshole!) and Janet (Slut!).
