Dear Editor, Re: Mayor Leffingwell calling me a “maniacal fool” in an email in response to my criticizing his light-rail plan. The mayor’s email said: “This is a wildly irresponsible statement – off by 2 orders of magnitude (2 decimal pts) on cost. The maniacal fool should be called on it.” So I’m calling myself on it: I was typing too fast with two fingers and accidentally wrote that the cost of the trolley line would be $150 billion, not $1.5 billion, which naturally prompted the mayor’s anger. Immediately after the email was released, the mayor tracked me down and basically could not stop apologizing. And I kept interrupting, saying an apology was neither necessary nor appropriate, that it was obviously an aberration by a consummate gentleman, a true class act (which unfortunately too often I have not been). Finally, I told the mayor what my friend Southwest Airlines founder Herb Kelleher often said: “Levy, sometimes I really do resent your perceptivity.” The mayor and I both laughed. And so it goes.