Hallucinations

Hallucinations are random occurrences in Four Nights at Furby's and its sequel, The Week at Furby's, and are programmed to occur very rarely throughout the players' night. They were some of the first features programmed into the game, and can only be seen if looked at carefully enough.

Camera Hallucinations
Camera Hallucinations are when something in the cameras appears slightly different. So far, only the Parts & Service room and the Main Hall have things like this.
 * In Parts & Service, If both Furbeen and Furble are lying down, there is a rare occurrence that they can both appear eyeless. In the game's costume files, this is called "Parts & Service, but something terrible has happened...".
 * Also in Parts & Service, if Furbeen is the only one in the room, he can rarely be seen looking at the camera, complete with red eyes. This is simply called "Part & Service with Furbeen looking at camera".
 * In the Main Hall, there is a rare occurrence that a Black-colored Furby that appears dismantled will appear on the ceiling, with a loud and garbled radio noise playing until you switch cameras. This is actually a teaser for the Week at Furbies, where this furby is a new animatronic.

FOV Hallucinations
FOV (Field of View) Hallucinations can appear whether or not the cameras are up or down. There are only 3 varieties:
 * One with Furble without eyes in a black background, with captions saying "No eyes".
 * One with Furbeen with human-like eyes in a grey background, with captions reading "I see you"
 * One with Furblue screaming in a white background with captions reading "Here I am". This is also one of Furblue's spoken lines.

The Week at Furby's

 * In The Drive-Thru, if Golden Furby is in the camera, like when he starts, he can rarely be seen looking at the camera.