The hill has a big hole in it. On Saturday morning, the big boss showed up at the top of the hill. And for the next two days, it pulsed a tiny red laser light around and around, watching what we were doing.The laser level has a buddy, called a detector, that you attach to a big measuring stick.  He's kind of the inside guy, with the inside scoop.  When the detector is level with the flashing red light, it beeps, and you know how deep to dig. But before we get to digging, w