Never Trust A Trailer taken to the extreme. Some trailers are so untrustworthy they include scenes that have been cut from the film itself to draw in crowds. This may be a somewhat underhanded attempt at avoiding Trailer Joke Decay, but it's just as annoying. Especially if half the reason you wanted to see the movie in the first place was that scene.

Examples:

• Trailers for the 2005 Disney film Chicken Little almost always included this joke:
  Dad: "Son, there's something I want to tell you."
  Chicken Little: "What, dad?"
  Dad: "In about three seconds I'm gonna scream like a little girl."
  • However, this scene was conspicuously absent from the film itself.
• The trailer for Peter Jackson's King Kong had Jack Black telling Naomi Watts to scream for the camera, and then she seems to see Kong and screams for real. Not in the movie.
• Galaxy Quest had this, as well. Tim Allen's character is trying to explain everything off as a "big misunderstanding" to the alien Big Bad, but said alien covers Mr. Allen's mouth with his hand as he says "-standing". Played for laughs, obviously, being a comedy and all. A moment in the film where such a scene would logically fit in was present, but the shot itself didn't happen - the scene was significantly more somber.
• The Incredibles did this with the bouncing belt buckle gag.
• Some trailers for Who Framed Roger Rabbit had a scene where Valiant runs around wearing an animated pig head, yelling "I'm a TOON!" It came from a deleted scene, shown on the DVD.
• In the trailers for Pirates of the Caribbean: Dead Man's Chest, There was a rather humorous trailer gag where they were on the island with cannibals about to leave, when someone says "What about Jack?" Cut to a scene of Jack running away from about fifty cannibals. Will says "Nevermind Jack, let's go!" In the movie, Will's line was changed to "Time to go!" and they waited for Jack to board the ship. Which is significantly less funny.