This quote comes from Anakin Skywalker in Star Wars: Episode III – Revenge of the Sith, released in 2005. The film became a major source for meme audio online, and this line spread in reaction edits because it expresses sudden regret in a clear, recognizable way. It is still used in short videos, compilations and soundboard clips whenever creators want a dramatic movie quote for a bad choice, failed plan or painfully awkward reveal.