Blastr.com wrote a quick article about 15 of their favorite Science Fiction cameos. A cameo is a brief appearance of a known person in a work of the performing arts. An actor needs not fill such a role: short appearances by film directors, politicians, athletes, and other celebrities are common. [Wikipedia].

They’re short, they’re sweet, and they usually feature an actor or celebrity as never seen before. With movies like Iron Man (2008), Thor (2011), and most recently X-Men: First Class (2011), cameos have become the norm. However, not all cameos are created equal: The best cameos are often those in which real people play themselves on screen, making it a huge surprise for the audience when they appear. Cameos don’t need to be ironic or funny to be memorable; they just need to be innovative and surprising.
Popularity: 26%
A catch phrase (or catchphrase) is a phrase or expression recognized by its repeated utterance. Such phrases often originate in popular culture and in the arts, and typically spread through a variety of mass media (such as literature and publishing, motion pictures, television and radio), as well as word of mouth. Some catch phrases become the de facto “trademark” of the person or character with whom they originated.
We all know someone who’s a walking catchphrase waiting to happen; they relish that moment when they can slip in to a conversation their favorite over-used movie catchphrases. The interesting thing is that most people use the same ones, over and over again. – moviefone.com
Moviephone’s The 10 Most Over-Used Movie Catchphrases:
Other catchphrases that we’ve heard people use:
Popularity: 12%
Recently David Madison posted an article on Unreality Magazine listing The Most Memorable Fictional Drugs in Movies and Television. The list itself is interesting, and I have to admit the author did a fine job finding screen captures for each of the drugs mentioned.
However, I had the feeling that there must be other well-known, fictional drugs in cinema. A little bit of research (thanks to Google and Wikipedia) turned up a plethora of pharmaceuticals the author neglected to mention…
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Popularity: 10%
“He looks determined… without being ruthless. There’s something heroic
about him. He doesn’t look like a killer. He comes across so calm…
acts like he has a dream… eyes full of passion.” – The Killer (1989)
Assassin movies are a guaranteed hit with moviegoers. And for some reason, we too often cheer on this ‘bad guy.’ Why?
Hitmen are the inevitable descendants of our Western gunslingers like Gregory Peck in The Gunfighter (1950) or Alan Ladd in Shane(1953). Even when those films were made, there was acknowledgement that such killers had already outlived their usefulness and had no place in civilized society. But modern cinema isn’t so “civilized,” because professional killers are thriving in it. The reason is most likely that hitmen are ‘cool’ because, like rebels, vampires, psychopaths, and Lords of the Sith, they operate totally outside of societal norms and do whatever they want. Such freedom is enviable, but naturally not the sort of behavior most people would think of emulating. That’s sort of the basic pleasure of cinema: escapism.
In the vein of celebrating these anti-heroes, Movie Trailer Talk has compiled the “Top 10 Badass Hitmen Movies” (summaries added from IMDb):
Popularity: 20%