Performance flying directors design people flying effects for a performance and supervise or perform the execution of it. Their work is based on research and artistic vision. Their design is influenced by and influences other designs and must be conform with these designs and the overall artistic vision. They train the actors for the flying choreography and manipulate them during the performance. Performance flying directors prepare and supervise the setup, perform security checks and operate the person fly systems. The manipulation of persons on height, close to or above performers and audience makes this a high risk occupation.