The exact recording behind this clip is uncredited, so its history is really the history of reaction sounds online. Inception has been shorthand for confusing, layered storytelling since the film's release, and short voice reactions like this one circulate as a relatable way to say a plot just broke your brain. It sits alongside other quick emotional outbursts such as oh my god, wow and damn, which creators swap in depending on whether the moment needs shock, disbelief or comic defeat.