The lesson
Open a demo-day pitch with the result as a score, then make the pitch a live run the audience can replay.
A deck rebuilt by Pitch Unfairly. The cover says "Every file is too big, so we compress it from the middle out." beside a "WEISSMAN SCORE 3.8" card and "Hooli Nucleus 2.89". A demo slide says "Hand us any file. Watch it shrink live." with a terminal log and a "Run it again" button; the proof slide has "Replay".
Every score and file size is fiction from the story, so don't treat them as results. Keep the single-metric opener and the re-runnable proof; use a measure your buyer can verify.