The sound comes from Undertale, the 2015 role-playing game by Toby Fox, where Sans summons skull-shaped Gaster Blasters during his boss battle. Their charging noise signals a beam attack is about to fire, and players quickly learned to associate it with an almost impossible fight. Clips of the battle, remixes, and animations spread the effect across YouTube and TikTok, where creators began using it outside the game. It remains popular because that short charge instantly reads as danger, power, and a joke about to hit hard.
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The Gaster Blaster charging sound from Undertale, a short rising energy effect Sans uses in battle to telegraph a powerful blast attack for memes.
The clip is a brief, tense build-up of crackling energy as a Gaster Blaster powers up, rising in pitch and intensity until it feels ready to fire. It has no voice or music, just a sharp, electric charge that sounds like a weapon gathering power in a dark, echoing space. Heard in isolation, it creates instant anticipation, making listeners brace for something big, funny, or devastating to follow. That sudden sense of incoming impact is why it works so well as a warning, a dramatic pause, or the beat just before a reveal lands.
