Tony Stark, played by Robert Downey Jr., first led the Marvel Cinematic Universe in Iron Man in 2008 and became one of its most quoted characters through the Avengers films. His fast, sarcastic lines were widely clipped from trailers, interviews and movie scenes as social video grew, turning short voice snippets into reaction sounds. This one-second style of clip survives because it needs no context, fans hear the tone and instantly connect it to Iron Man, making it useful long after the original scene.