Nyeh Heh Heh!

"" is the 16th track in the Undertale Soundtrack. It is an upbeat song with an 8-bit sound. In addition to being Papyrus' theme music, this track is part of the Easter Egg that plays at the end of a Pacifist Run of the demo, playing during and after Sans and Papyrus's conversations.

Trivia

 * The song is called 'mus_papyrus' in the game files.
 * According to an interview with Toby Fox, this was one of the six songs originally composed for other projects. The other five were Fallen Down, Heartache, Bonetrousle, Another Medium, and MEGALOVANIA.
 * Heartache, Nyeh Heh Heh!, and Bonetrousle were initially made for another RPG idea that never came to fruition.