I would want a rewind button to go back and fix every mistake so my family can stop hating me and I can actually make them feel proud of me instead of them always being mad at me
In this situation, Huck is trying to be impressive. He is trying to get the point across that he is funny and "cool". This lie is not only the one of a kind for Huck, but also one where he tries to push his reputation past its limits.