A company is doing some routine maintenance of a high-voltage transformer (for which it charges a little over $120,000) when one of its employees allegedly accidentally drops a washer into the thing. Of course, the transformer isn't on at the time. But now we've got to get the washer out, lest we turn the thing on and have it (potentially) explode.
How much do you think the dropped washer cost?
That's an expensive washer.