The sound comes from the Substitute Teacher sketch on Key and Peele, first aired on Comedy Central in 2012 and performed by Keegan-Michael Key as the short tempered Mr Garvey. In the sketch he reads the register with absurd pronunciations, turning Jacqueline, Blake, Denice and Aaron into mangled versions that students try to correct. The Aaron exchange became the most shared part, spreading widely on YouTube and in reaction edits. Its lasting appeal is the clash between Garvey's certainty and the obvious correct pronunciation.