Such occurrence as filmed can be frightening and a traumatic experience for the crew on board.For some people the panic attack can occur abruptly and gives little warning but others who suffer from regular panic attacks may find that they are able to identify the cause of the fright or know when anxiety is developing and likely to cause a full panic attack. It could be often triggered and compounded by a certain topic or an incident that the victim had a frightening history in the past that leads to severe panic disorders.