AT THE END OF A LOCAL FAMILIARIZATION FLIGHT, THE GLIDER LANDED APPROXIMATELY 300 FEET FROM THE END OF THE RUNWAY. DURING THE LANDING ROLL, THE LEFT WING CONTACTED THE TALL GRASS NEAR THE RUNWAY EDGES AND SPUN THE GLIDER TO THE LEFT. THE RIGHT WING CONTACTED THE SURFACE AND THE GLIDER CAME TO REST 90 DEGREES FROM THE RUNWAY HEADING. NORMAL PROCEDURES FOR LANDING IS TO LAND 500 FEET OR MORE DOWN THE RUNWAY TO AVOID THE TALL GRASS NEAR THE APPROACH END. THE SECOND PILOT ON BOARD THE GLIDER REPORTED THAT WHILE ON FINAL APPROACH, HE TOLD THE PILOT IN COMMAND TO LAND FURTHER DOWN THE RUNWAY.