Iron Man first appeared in Marvel Comics in 1963 as Tony Stark, a wealthy inventor who builds a powered suit of armor to survive and fight back. Robert Downey Jr. brought the character to global fame in the 2008 Iron Man film, which launched the Marvel Cinematic Universe. The mechanical suit sounds and heroic energy from those films became instantly recognizable online, spreading through trailers, edits and fan videos. Creators still reuse the audio as shorthand for technology, confidence and a dramatic superhero transformation.