Approximately every three hours, the sound of a busy signal comes on. We have no idea where the sound originates. We’ve checked upstairs and downstairs in our building. While people confirm that they hear it as well (so we know we’re not crazy), nobody knows where the sound originates.

Perhaps there is a phone between the walls – eternally off the hook…and the busy signal comes on every time the phone is reset? Perhaps we are the lab rats in some sophisticated psychology experiment equivalent to the ancient old practice of water torture, drop by drop? Perhaps there is just something in the water…

Any brilliant insights out there?