The Weird Route Jingle originated in the 2021 release of Deltarune Chapter 2, an episodic RPG developed by Toby Fox. In the game's files, the sound is associated with tracks like snd_ominous. It plays during the hidden, darker path where the player manipulates Noelle Holiday into freezing enemies. The sound quickly escaped the game and went viral on platforms like TikTok and YouTube. Creators use it as a Pavlovian trigger for guilt, often editing it into real-world scenarios to show someone making a disastrous choice.