An Inconvinient Acquaintance

I can't be the only person in the world who knows somebody who always manages to call at precisely the worst time.  If you're in the middle of hauling a hundred pounds of wheat to your basement, eating dinner, on the phone with someone else (and not one of those conversations you can interrupt), having sex, you know...doing anything that they shouldn't be calling during, and they call.  It doesn't matter the time or the day, they somehow manage to get you whenever it's inconvenient.  All I want to know is what kind of sixth sense do they possess, and how can they turn that evil into a force for good?