Small Shock

Small Shock is the 74th track in the UNDERTALE Soundtrack. This plays when you initially meet Asgore and the dark, somber realization hits him. It consists of 2 melancholy flute sounding chords that introduce the character to a very upsetting scenario that has unfolded.

The track also plays at a slower speed in a playthrough in a Genocide Route, during the protagonist's walk to the castle and their encounters with Flowey.