Butt-dialing reveals the truth. It is the 21st century equivalent of a Freudian slip. In an unfortunate incident in Sanford, Fla., a Papa John's pizza delivery driver unknowingly called a customer and left a racist five-minute voicemail about him.

The customer posted a video of the delivery driver's voicemail on the web. In the voicemail, the delivery driver mocked the customer and his wife to a co-worker. Bizarrely, the voicemail is a made-up, racist, opera-like rant about how the customer was a bad tipper-despite a 21 percent tip. Papa John's fired both offending employees.

Papa John's CEO John Schnatter released a statement of apology on the company's Facebook page. In it, he wrote, "My heartfelt apology goes out to the customer involved, his family, and our community at large. I am very sorry that anyone would be exposed to these hurtful and painful words by any person involved in any way with our company."

The opera the driver sings in the video is "Figaro's aria" from Gioachino Rossini's "Barber of Seville," first performed in 1816.

Watch the video here.

Disclaimer: the video contains offensive language. NSFW