The Green Goblin Mask meme originates from the iconic portrayal of the Green Goblin by Willem Dafoe in the 2002 film "Spider-Man." In the movie, there's a memorable scene where Norman Osborn (played by Dafoe) converses with his sinister alter-ego, the Green Goblin, through a mirror reflection. This scene is particularly striking as it encapsulates the internal conflict and temptation of embracing one's darker side. The phrase "You know what must be done…" is often associated with a pivotal moment where the character contemplates giving in to his more chaotic impulses. This image has since been repurposed as a meme to humorously illustrate the internal struggle many face when tempted to make impulsive decisions.