It sounds like a sci-fi movie.
You're walking down a hallway in an office building after hours and the lights go on as you approach and turn off on their own after you pass by.
But it's not a technostalker on your heels - it's merely simple infrared sensors.
They are among the many energy savings proposed in the EnergyWorks program being unveiled today by Mayor Nutter and members of the Metropolitan Caucus, made up of Bucks, Chester, Delaware and Montgomery counties.