RedactedNarrative: Unit #1 was traveling North on ICW in North Myrtle Beach. Unit #2 was legally traveling south on ICW as unknown vessel. The wake of the Unit #2 approached with Unit #1 and Unit #1 did not navigate directly into the wake forcing Unit #1 into boat lift and dock area damaging ski/dock. While Interviewing operator, R/O inquired of him how the injuries occurred. Operator explained to RIO that he did not remember anything from the accident. Operator was complaining of injuries to his collarbone, knee and leg, but could not provide any further information to the R/O about how the injury occurred or what he may have hit to cause the Injury. R/O believes the injury could have been caused by any of the objects involved In the accident, the boat lift, the jet ski, or the dock area the injured subject landed on. There was no way to tell based of the evidence at the scene to determine definitively what caused the damage and with the subject "blacking out" and not remembering anything, there is no way to know what caused the injuries.