Watching Paint Dry

Watching Paint Dry is a sourcemod for Half-Life 2 based on the jocular term "watch paint dry". The premise of the mod is to simply watch paint dry in real-time. Despite this, Watching Paint Dry features multiple endings and references to memes and other mods such as The Stanley Parable.

One of the endings reveals that the narrator is in fact Bonzi Buddy. Bonzi would then destroy the world, crashing the game.

Vinesauce
As part of Spooptober 2019, Vinny streamed Watching Paint Dry. When he gets the ending that reveals the mod's narrator is Bonzi Buddy, Vinny becomes pissed and complains that it is not even his meme.