As Johnson tells Kelly Clarkson, the two are also good friends. You can see what kind of friendship they have as The Rock is pretty hilariously messing with his buddy, in a way that many good friends do. Kevin Hart is not a large man, he’s only 5′ 4″, which is where all of Dwayne Johnson’s jokes are coming from. Of course, when you’re Dwayne Johnson, pretty much everybody looks tiny so these jokes work across the board.
Article source: https://www.cinemablend.com/news/2479506/the-rock-cant-resist-joking-about-kevin-hart-while-giving-health-update