I need a clock that can keep track of time correctly, but that between 3 a.m. and 5 a.m. each day reset itself so that it is somewhere between fifteen and zero minutes fast. That way I would get up in the morning, look at my clock and not know whether I had fifteen minutes to spare or no minutes to spare. You see, I currently have my clock set five minutes fast, but it really doesn't work because I know that it is five minutes fast.

I'll bet a clock like that would sell pretty well.