Yesterday I had a scare. No one died or was injured. A web page was accidentally deleted. This page took almost a month to create. I couldn't find the backup file. A colleague was able to find it and restored the page within 5 minutes. Then he taught me how to find the backup, where it was stored, and how to restore it.
I learned a new skill thanks to a mistake and the colleague that rescued my mistake. Still I learned. That's exciting to me.