My first real job my boss told me "Everyone fucks up, it's ok, when you do your first big fuck up... just be honest, and tell me."

3 years later I accidentally took down all the ATMs for one of the largest consumer banks in America for a while in the middle of the night.

My boss came in "Hey you finally did it, you took longer than most, but that was a good one!" and that was all that was ever said about it.