Here’s a good lesson in how a small typo can have a ripple effect on software. A user marked up a building in Melbourne as 212 floors instead of 2:
https://twitter.com/liamosaur/status/1296305262144364544?s=10
This was quickly corrected, but not before Microsoft grabbed map data to build the Flight Simulator World. The result? A 212-story obelisk in Melbourne.