A similar PLC story: A friend was an intern at a well known coffee manufacturer. He was writing code for new sensors to use which were to be installed on the as

A similar PLC story: A friend was an intern at a well known coffee manufacturer. He was writing code for new sensors to use which were to be installed on the assembly line machines later that year. There was a staging machine that his team used in the same room, and they would log into the machine and push their code to run tests. He sent the machine an update, rebooted it, yet the staging machine was acting unchanged from the previous version. Moments later a supervisor ran into the room, yelled to put his hands up from the keyboard, reached over him, ran some commands, and disappeared into another room. A few minutes later he announced that my friend logged into the main assembly line machines and rebooted them with code that used a sensor that didn't exist yet, which stopped the entire chain for ~20 minutes. The company suffered $250k production losses during that time.