My biggest f*ck up: When I worked for a financial institution my manager gave me a production level username and password to help me get through the mounds of

My biggest f*ck up: When I worked for a financial institution my manager gave me a production level username and password to help me get through the mounds of red tape which usually prevented any real work from getting done. We were idealists at the time. Well I ended up typing that password wrong, more than 3 times...shit, I locked the account. Apparently half of production's apps were using this same account to access various parts of the network. Essentially, I brought down half our infrastructure in one afternoon. Lesson learned: Don't use the same account for half your production apps. Not really my fault :).