I performed a two-minute manual query on a MySQL database I was told was a backup. What I didn't realize was that it was a live backup, and that it would stop t

I performed a two-minute manual query on a MySQL database I was told was a backup. What I didn't realize was that it was a live backup, and that it would stop the production database from responding to queries for those two minutes, meaning that authentications failed for two minutes. Several colleagues called for my employment to be terminated immediately, but luckily they got distracted by other issues.