Hank Pym is the original Ant-Man in Marvel comics and is played by Michael Douglas in the Ant-Man films, starting with Ant-Man in 2015. The character is known as a brilliant but blunt scientist, which makes his frustrated reactions popular as short clips online. This what the hell line circulated on soundboards and in fan edits as a quick Marvel reaction, used whenever a hero, villain or experiment does something unexpected. Its brevity keeps it useful for memes, edits and reaction videos.