Air horns were originally used as loud signaling devices on boats, trains and at sporting events, where a portable canister horn could be heard over a crowd. Online, that same blast became a staple of montage parody culture in the early 2010s, closely linked to the mlg air horn used repeatedly in fast-cut gaming edits. Clips layered several horns at once for comic excess, and the single big blast survived as a cleaner version for memes, streams and short videos where one loud hit is enough.