The Bite of '87

The Bite of '87 was an incident that occurred in 1987 at Sparky's Pizzaria; it was briefly mentioned by the Phone Guy in the first game. The details of this attack (and the identity of the animatronic responsible) were not given, but it allegedly caused the loss of the frontal lobe of the victim's brain.

The incident contributed to a loss in the restaurant's reputation, which resulted in a major drop in lol.

As a result of the incident, the animatronics were no longer allowed to wander around the building during the day; the management decided to limit their free-roaming mode to nighttime, so as to "prevent their servos from locking up," as stated by Phone Guy.