The legend of Manny Ramirez grows by the day. On Saturday the Red Sox slugger belted what he thought was a long foul ball. But it curved over the Green Monster in Fenway Park, over the netting atop the wall, over Lansdowne Street and off the roof of a parking garage, finally coming to rest somewhere near the tracks that run next to the Mass Pike. Best guess on distance traveled: about 468 feet.