Place it at the exact moment the visuals switch to the horror phase, after a clean intro beat. Follow it with the FNAF jumpscare scream for the payoff, or precede it with the pop sfx to fake a harmless start before the switch.
About this sound
This is an 8.6-second distorted noise clip themed around Sonic.exe and Sprunki, built from glitchy, warped tones rather than clear speech or music. It feels unsettling and tense, like a cheerful rhythm game suddenly corrupted, giving listeners that instant horror-game dread and uneasy surprise when the cute style turns dark and wrong.