No clear original source is attached to this short upload, which is common for reaction lines that circulate as isolated soundboard clips. The existing note about scratching hints it was shared in a casual, jokey context rather than as a polished effect. Online, short blame phrases like this survive because they are instantly reusable: editors can lift the line without setup and apply it to almost any visible mistake. Its popularity comes from timing and tone, letting a three second clip do the work of an entire argument.