VATS stands for Vault-Tec Assisted Targeting System, a signature gameplay feature in the Fallout series. The sound is closely associated with entering that combat mode, where time slows and body parts can be targeted. As Fallout clips, mods, and memes spread online, the VATS cue became useful outside the games too. Creators now use it as a shorthand for sudden focus, tactical thinking, or pretending a simple moment has life-or-death stakes, much like the Inception Button is used to exaggerate drama.