u/ChristianLS

Bumi, The Legend of Korra: >!Bumi is constantly telling his siblings about the wild escapades he's gotten up to. At first we assume he just likes to tell tall tales, but later on we actually see him having the exact kind of crazy, lucky, seat-of-his-pants adventures he's always claimed, strongly implying everything he's been saying was true all along.!<
Edward, Big Fish: >!Edward has always told his son Will fanciful tales about his life, and eventually his son got fed up with the obvious "lies" and they became estranged. On his death bed, Will comes back to see his father again before the end, and the two make up as we see flashbacks depicting all of the tall tales. After Edward dies, characters from all the stories (albeit less-exaggerated versions) come to his funeral and we see that the tales all had at least some truth in them.!<