The exact original source of this clip is unclear, but online it is widely used as a reaction sound rather than for historical context. Creators pair it with visual jokes about intelligence, wild hair, science references, or anyone suddenly acting like a genius. It fits the same broad reaction-sound space as oh my god, wow!, where the humor comes from immediate exaggerated surprise. The sound stays popular because Albert Einstein is instantly recognizable, so the joke is easy to understand even in very short edits.