The 'That Changes Everything' meme is a versatile reaction template used to express a sudden shift in perspective or a dramatic realization. While the phrase itself is a common cinematic trope used in countless films and TV shows to signal a major plot twist, it has become a staple in internet culture for highlighting small, often trivial pieces of information that 'change' the context of a situation. Whether it's used with a character looking stunned or a high-stakes moment in a drama, users apply this template to satirize over-the-top reactions to mundane facts. It is frequently seen on Reddit and Twitter to mock how one tiny detail can completely derail a previous argument or expectation, turning a simple observation into a monumental revelation.