Jump #250 at Skydive Palatka. Opening shock from hell which snapped 3 lines. Horizon spinning, went to grab toggles and they were not there to be grabbed. Tried to counter spin by pulling on opposite rear riser to no effect. Cutaway at 2000, got stable, pulled reserve and under canopy again at 1200. Landed in front of DZ and bought a case of beer. That mal occurred on the same day I received my D rating.