A screamer is an internet prank, where you get someone to watch something calm, or play something simple. with a scary face popping up at the end, with a loud scream.
Origin
In 2003 a flash was uploaded to a site called “Kimo”. the flash was called Kikia. It was a simple flash animation with a boy laying in a field, with text in the top left. once the video was done, a face from the game “Fatal Frame 2” popped up with a loud scream.
Spread
While Kikia was the first, the most famous one is The Scary Maze Game, a simple flash game that makes the viewer concentrate as hard as the player can to get to the end of the maze. and a close up of Linda Blair from the excorsist pops up with a loud distorted scream. another popular one is Scary Ghost Car. Where a car is driving through the mountains, with calm music in the background. and the car goes behind a bush and a zombie pops out with a loud scream. Scary Ghost Car is actually an ad for the german company K-fee, and there has been many other K-fee ads (most featuring the Zombie, others featuring a Gargoyle.)
List Of Most Famous Screamers
Scary Maze Game
Scary Ghost Car
Kikia
Rocking Chair Ghost
Jingle Bells Reversed
Press the red dot
Wheres Waldo
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Screamers are still used as of today, but there not as scary as they was back in 2005-2010.
Source(s): http://www.urbandictionary.com/define.php?term=Screamers