Vessel 1 was towing a skier. Operator of this vessel stopped to pick up the skier out of the water.  Vessel 2, was towing a skier toward vessel 1.  Operator2 was looking at the skier in the mirror and was not paying attention to other traffic. Vessel 1 operator and skier tried to signal Vessel 2 operator by yelling and waving.  Vessel 2 hit vessel 1 on the starboard side stern, ramped up and exited on port side bow.  Vessel 1 operator jumped out to avoid injuries.
WEST PALM BEACH