Treasure on the Beach

So, the kids decided to dig for treasure.  They dug and found a rock.  Their belief was that the rock was in the shape of an X.  So, they kept digging to get under the rock because, of course,…. X marks the spot.  After surmising that their rock was probably about several hundred pounds in weight, I suggested that they perhaps might not be successful digging it out.  They kept digging anyway.  Good for them.