to exaggerate or to not exaggerate

my uncleinsurance is great at telling stories. they are 'tall tales' and they make you laugh. football was telling him about his baseball game and uncleinsurance was trying to help him make the story a bit more entertaining through exaggeration. football listened to him very seriously and nodded several times to show he was following along. when the lesson was over, football said 'thank you. but that's *not* what happened.' it made me smile because my son is such a truthful boy.