A South Park episode from 2014 featured a scene that brilliantly pivoted in the days between promotion and broadcast, making a small but vital update to ensure the moment was funny and as true to life as was reasonable. The animated sitcom is known for its rapid production time, but going back and making edits to a finished episode before it airs is a little less common for co-creators Trey Parker and Matt Stone. However, it has happened before.
