Re: What I would like to know is....
It is not just when working on computers. Screw drivers are a vindictive lot with a sense of humour. They watch for the time when you have just spent 15 minutes lining up the most darned difficult set of bits and need to drive the screw to hold it from collapsing. Normally the driver is to be found in another room, or if assisted by a wife in the tool box in the tool store as it you "have finished with that thing".