I have learned a really embarrassing lesson, which is, not to exaggerate to my son, if it’s possible he can eventually find out the truth.
I told him a long time ago that when I was a senior in high school living in Chicago, I was also a 10th degree black belt in karate, and I knocked out a bully. Unfortunately, my brother (his uncle) told him what really happened. Even though I knocked out a bully, it had nothing to do with karate. What really happened was, I was not a 10th degree black belt, but the incident happened in January when the temperature was 10 degrees. And I ended up knocking out the bully by taken off my frozen black belt and hit him with the buckle, before running away like an Olympic sprinter. When I saw him a few days later, I convinced him that he must’ve been suffering with hypothermia and the confrontation never took place. My son seemed charitable and said he was impressed with how good a liar I was. He was probably being sarcastic.