CinemaBlend Copy to clipboard There are pranksters, and then there's Kevin Hart and Nick Cannon. The two celebrities are not necessarily known for going for a Punkâd moment, but this week the two of them have established a seriously entertaining and high-stakes prank war. In response to a birthday prank from Cannon to Hart involving a llama, on Thursday, Hart got back at Kevin Hart shared a very real picture of a digital billboard he set up in Los Angeles on his Instagram account. On the billboard, Hart published Nick Cannonâs phone number as a line for people to call for âadvice on fatherhood.â Check it out: