The lesson
Present a failure as a post-mortem with a timeline and a root-cause chain, so the audience gets the lesson without being told it.
A deck rebuilt by Pitch Unfairly. It opens on "Fetch didn't happen. Here's exactly why.", then a TL;DR slide with a giant pink 0 and the tally Launches 3, Evangelists 1, Veto holders 1, Tables reached 1. Later slides: a 602 vs 0 counter, a five-stop timeline and a Five Whys ladder.
Skip the joke format and the school setting. Every figure here belongs to the story, so none can be quoted as a metric. Keep the TL;DR-first order and the ladder of whys.