RedactedNarrative: While towing three people on a tube, vessel 1 hit a large wave causing two of the persons being towed to collide heads; causing a large laceration to one of the persons.  The other person obtained a laceration at the bottom of the chin and was knocked unconscious briefly.  All occupants in the water boarded the vessel which headed north to the North Pool boat ramp where EMS was waiting for them.  The two injured persons were transported to the hospital for treatment.