Iron Man is the Marvel armoured hero from the comics, brought to film audiences by Robert Downey Jr., and workshop sounds of metal, machinery and impact became closely linked with his character in edits and memes. This hammer hit fits that world because it sounds like work in a forge or armoury, even when used far from any film clip. Online, short impact sounds travel easily between gaming videos, DIY clips and reaction edits, where one strong hit can sell a joke or reveal without dialogue. Its simplicity is why it keeps getting reused.