Shaken but relieved airline passengers were continuing their journeys after surviving a terrifying ordeal in which a gaping hole appeared in their jumbo jet 30,000ft up.Flooring gave way, part of the ceiling collapsed and debris flew into the first class cabin on the Qantas Boeing 747 which was flying from London to Melbourne.Scared passengers, some of whom were woken up by a loud bang, had to don oxygen masks as the plane descended after losing cabin pressure on the Hong Kong-Melbourne leg of the flight.Film shot by passengers and displayed on websites showed the scenes on board the plane as the captain announced that he was making for Manila in the Philippines for an emergency landing.Passengers spoke of «part of the ceiling» flying past them, while others told how children were crying. Some aboard vomited after the plane managed to land safely at Manila, with all 346 passengers and 19 crew able to disembark normally.