I'm not sure specifically as there could be many stories. It might be about an encounter they had, a funny incident, or something related to their experiences in the comedy world.
It could be that Dave Chappelle did something really interesting or unique that Joe Rogan felt was worth sharing. It might also be a way for Joe to show his respect for Dave's work in comedy or to give his perspective on a situation involving Dave.
Another story could be from his adventures in martial arts. Since he's into MMA, he might tell about training with some of the top fighters. He could describe the intensity of the training sessions, the techniques he learned, and how martial arts has influenced his life in terms of discipline and self - confidence.
One funny story could be about some of the strange backstage antics at a comedy show. Maybe there was a mix - up with the props or a fellow comedian did something really goofy before going on stage.
Well, Dave Chappelle is a very private person when it comes to his family life. However, it's known that he is married. Their story might be one of love and partnership. His wife is probably by his side through the ups and downs of his comedy career. She may also be involved in raising their children and maintaining a normal family life away from the spotlight that Dave is often in. Maybe they met in a normal, everyday situation and their relationship grew from there.