[pjc50]

The "system doesn't work with negative datum" bug allegedly hit F-16 flight control software, resulting in a plane that would flip upside down on crossing the equator.

[contriban]

They are upside down down there, so it was a reasonable feature.

[SamBam]

Right, it was trying to keep them upright. Northerners' bodies aren't designed to work upside down...