One of the interesting stories Peter tells might be about his crazy adventures at the local bar. He could be exaggerating how he outsmarted the tough guys there.
Well, Peter often tells wild and wacky stories. In one Christmas story he might be sharing some crazy family adventure during the holidays, like the time they had a disastrous Christmas dinner with all kinds of mishaps and misunderstandings.
One interesting story Peter tells is about the time he thought he could be a professional boxer. It was full of his typical over - confidence and hilarious misunderstandings. He trained in really strange ways and ended up in a comical boxing match that was a total disaster but super funny to watch.
It might be a story from Peter's childhood. For example, he could tell Stewie about the first time he rode a bike and how he crashed into the neighbor's fence. He'd probably make it funny by exaggerating how high he flew off the bike and how the neighbor chased him around the yard.
Peter's stories can be really out there. One story could be about his experiences in the neighborhood. He might talk about his interactions with the neighbors, like Quagmire and Cleveland. There could be a story about a neighborhood party where Peter got into some sort of comical trouble.
One memorable story is when Peter joined a cult. He was easily influenced by their strange ideas and started acting really odd. His family had to rescue him from this situation. It showed how gullible Peter can be.
One interesting Peter story is when he tried to start his own brewery. It was a chaotic mess with all kinds of wacky experiments and misadventures. He had these wild ideas about the types of beer to make, but things kept going wrong, like the beer exploding or having really strange flavors.
Peter once told a story about going on a fishing trip. He thought it would be a relaxing time, but things went haywire. He accidentally hooked onto something really strange in the water, and then he got lost trying to find his way back. His fishing trip turned into a crazy adventure full of mishaps.
I'm not sure specifically which story Diane tells without more context. There are so many storylines in Family Guy that it could be any number of things.