The '1 Guy 1 Jar' meme refers to an infamous shock video that first surfaced in the late 2000s, becoming a cornerstone of internet 'hazing' culture alongside titles like 2 Girls 1 Cup. The video features a man attempting a dangerous stunt with a glass jar, which ends in a traumatic and gruesome accident. In modern meme culture, the actual imagery is rarely shown directly; instead, the meme focuses on the collective trauma of those who have seen it, often using 'Those Who Know vs. Those Who Don't Know' templates. It serves as a rite of passage for early internet users and remains a frequently cited reference in internet history iceberg videos and 'don't google this' challenges.