The 'Scary Soda' meme originated as a parody of low-quality 'two-sentence horror' stories often found on internet forums. The humor stems from the absurdly simple and non-threatening escalation from drinking a normal beverage to realizing it is 'scary.' It typically features a character experiencing a moment of intense, surreal realization mid-sip. The meme has evolved into a staple of irony and surreal humor, used to mock poorly written creepypastas or to describe situations that are unexpectedly unsettling despite appearing mundane.