Don't upgrade MYSQL on production without backups! Fortunately I was able to pull the database files into a old version and export them, but that was a really tense conversation with my boss.

Thinking back on it, they put a LOT of trust in me at 16. I was the only web dev at a small GIS shop for a summer. They hired me on to rebuild their PHP websites. I didn't know PHP at the beginning of the summer.