Operator of vessel 1 stated he was traveling  behind vessel 2 at a high rate of speed.  Vessel 2 was impacted by vessel 1 after vessel 2 ceased forward progress and veered sharply to the right.  Vessel 1 struck vessel 2 in the starboard stern area.  Operator of vessel 2 stated he thinks he hit something and spun around in front of vessel 1 being struck and knocked into the water.  Operator of vessel 2 sub stained injuries that needed medical treatment.  Injuries was a cracked vertebrae and ribs along with bruised kidney.  Operator of Vessel 1 had no injuries.  Only damage was a small tear on seat of vessel 2 and light scratches on vessel 1.  Officer stated there was no signs of alcohol or impairment of either operator.
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