Most of the worst production issues I've been involved with have come from trying to fix a minor issue and then somebody making a mistake. The way our brains are wired to handle stress isn't really useful for debugging complicated problems.
First, calm down.
I’m still amazed that he could be so calm when I’d just deleted a bunch of stuff on a clients production environment.
May not have been the most lucrative company I’ve ever worked for, but it was definitely the best one.