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Scary Pop Up Nyan Cat is a screamer video. It shows the famous Nyan Cat animation along with the Nyan Cat song. However at 2:41 it shows a close-up picture of Regan along with a loud scream from The Maze.

There is also a different version of this screamer with the picture of Regan replaced with Katie Embry from "The Ring" accompanied by two loud screams instead of one. 
Nyan Cat

Nyan Cat


NOTE: The following video contains a screamer.