Lake Delton police are examining surveillance video and comparing it to statements given by people involved in a fight at a water park.  The disturbance was reported Saturday afternoon at Mount Olympus Water and Theme Park.  Police say the video shows a violent fight which appears to have started over a person taking a chair from another group’s table.  Lake Delton police say it is anticipating that charges will be filed.  Officials with the theme park say they are cooperating with police as the incident is investigated.  There were no reports of serious injuries.