I once ran a batch import job to stress test with much more data than usual in staging... so I thought.
I sshd into prod by accident. History search can be a bastard at times...

The moment I realized what I was doing was crazy. I was shivering and thought I get fired if anything went wrong.

fortunately I just duplicated the original data for the test, and the system was built to ignore unnecessary updates... so the data was correct and nothing went wrong.

Not an active stupid dev choice but still something I will remember for a while.