John Cena and Shaquille O'Neal Talk Nicknames on 'Carpool Karaoke'

John Cena and Shaquille O'Neal are taking their turns on the popular singalong series Carpool Karaoke.

In a clip from their episode of the Apple Music series, the wrestling phenom and the NBA legend are seen discussing possible nicknames and making puns with each other's monikers.

While they aren't shown singing along to any music, one of Shaq's rap singles can be heard playing through the car speakers.  

At the end of the snippet, Shaq challenges Cena to a free-throw faceoff in which the loser has to do "something embarrassing."  

The full clip is available on Apple Music.