Normally it takes five 3K+ users to close out a question for whatever reason they choose. Or in the case of a race to the finish line, a sixth car will ghost past the checkered flag.
If a moderator steps in, they have the power to close with their lone vote, no matter however many have come before. None even.
But how does it happen when one user closes a question when the closer is not a moderator?
Case to the jury: How to force PHP to use UTF-8 charset
How does something like that happen?