The sound comes from a 2015 Vine by Nicholas Fraser, who sang his accusation to the melody of Next's 1997 R&B hit 'Too Close.' The short loop was shared far beyond Vine, becoming a standard reaction for calling out fibs on social media, in remixes and in edited clips. Its sung question proved more memorable than a plain spoken catchphrase, and the clip survived Vine's shutdown through reposts and soundboards. It is still used because the reference is widely recognised and needs no setup.