Prior to Version 0.07, the guillotine NPC that provides the Severed Head effect when interacted with was located in Block World rather than the Guillotine Room (the latter of which is commonly known as such due to the guillotine's presence there in later builds). Instead, the latter area only features the lunatic Toriningen and cupboards.

This early iteration consequently made Block World one of only two areas in the game that featured more than one effect (the second being the Hat & Scarf effect, which is obtainable from Block World in all known builds). From Version 0.07 onward, this distinction is only held by Mural World (which features both the Blonde and Long Hair effects).