A passenger was arrested at an Australian airport after he left a parked airplane through an emergency exit, walked along a wing, and then climbed down a jet engine to the ground. Jetstar Flight JQ507 arrived at Melbourne Airport from Sydney on August 22. It was parked at a terminal gate when the man left the plane by the right-side exit, officials said. Opening the exit deployed a slide from the back of the wing to the ground, a Jetstar statement said. But instead of going down the slide, the man walked along the wing and climbed down one of the Airbus A320's two engines. Passenger Audrey Varghese said passengers screamed as the man started behaving erratically shortly before he opened the door. She told Melbourne radio 3AW that as soon as the plane had started coming to a stop, the passenger went straight to the emergency exit row, pushing people out of the way, and opened the emergency door. Another passenger told 9News that the man had been vaping — which is not allowed — during the 90-minute mid-morning flight and had unsuccessfully demanded the air crew provide him with alcohol. Melbourne Airport said the man was detained by aircrew and ground staff before police arrested him. "Melbourne Airport is proud of the exceptional response from ground crew, which meant there was no immediate danger to other passengers or airport staff," an airport statement said. He was assessed by paramedics and taken to a hospital, a police statement said. Police will continue to investigate and charges are likely to be laid at a later date.