Tony Stark, played by Robert Downey Jr., first appeared as Iron Man in the 2008 Marvel film and became central to the Marvel Cinematic Universe. Short clips of Stark shouting or screaming were later isolated by fans and shared on soundboards and in edits as an exaggerated panic reaction. The clip spread in the same way as other famous movie screams like Darth Vader NOOOOOOOOO! circulating as shorthand for disbelief. It remains popular because Stark is normally witty and in control, so hearing him lose composure instantly signals comic alarm.