Stone Cold Steve Austin made 'What?' a signature part of his wrestling persona, using it to interrupt opponents and rile up the arena until the crowd started shouting it back in unison. That call-and-response became one of the most recognisable crowd chants in professional wrestling and later spread online as a reaction sound for confusing, arrogant or nonsensical statements. Creators still use the loud crowd version because it instantly suggests a whole audience disagreeing at once.