This kind of exclamation has lived on the internet for years as a reusable reaction line, traded across reaction soundboards, meme compilations and editing servers without a single confirmed source. Its appeal is purely functional: 'I'm coming!' is one of the most recognisable phrases in comedy, so it doubles as both dialogue and punchline. Creators keep it in rotation because it slots into arrival jokes, rescue bits and overconfident-hero edits with zero setup, and its short length makes it easy to layer over gameplay, prank footage or animated skits.