For the first time in twenty-five years I made a mistake that damaged a customer's piece of equipment. I was doing a last minute I/O check as there had been some discrepancies, and I inadvertently started a piece of equipment that provides no indication that it's running. My first clue was the loud crunching noise heard as some gears self destructed... :surprised The last time I made a mistake like this I shorted out an entire hospital! At least this time the damage was not quite so alarming. But damn, did I feel stupid. I am always soooooo careful. I can't believe that something got away from me like that. Of course to be fair to myself, I was set up a bit. I had no way to know that the equipement was running as there is no sound or light or indicator of any kind. Even worse: They had the torque turned down for testing but cranked it back up just before I got there. If they had waited until the testing was complete, as they should have, this never would have happened. But damn, did I feel stupid! At least they were very nice about it and they didn't seem to be terribly upset. They can probably fab some new parts in a few hours.