Heard a story a few years back about a new kid working on the institutional desk at a big house. I seem to remember it being during the summer, so he's filling in for the head trader, and hits sell instead of buy on a large order. As expected the market tanks, the firm makes no acknowledgement of the error, and covers making a few mill. They then take the kid into an office, ask him what the hell happened, explained he could be fired for this, and then send him to the firm villa somewhere in the Carribean for two weeks !!! That's what I want to happen when I screw up at work.