Sixteen-year-old Chan Kwok-kin was busy at his computer at 8am when a screeching sound caught his attention and his mother shouted for him to join her on the balcony. He appeared in time to see cargo fall from the flyover onto the slope facing his apartment at Peony House, So Uk Estate. 'It rolled for about three seconds in a Z-shaped route before it was trapped under the flyover,' he said. The teenage boy was scared that 'somebody might die'. A woman on the 17th floor also heard a loud bang. 'When I looked out, I saw the truck had fallen off the flyover and somersaulted. I saw the driver being thrown out of the vehicle,' the shocked housewife said. 'At first, he was motionless. I prayed for him ... Later I saw him moving and making a call with his mobile phone.' Another tenant said he saw 'around 50 fist-sized rocks' fall and almost hit a truck driver in Orchid Street. The rocks could have been concrete pieces from the slope. Six-year-old Hung Sui Ting, who lives on the seventh floor, said she was not scared. Her mother, Xie Lai Feng, 36, was woken up by the commotion. 'I was afraid it was an explosion. I was even prepared to make a run for it,' she said. She and her daughter were evacuated by police. A 40-year-old man, who declined to give his name, said residents had complained about the dangerous design of the flyover and had urged transport officials to rectify the danger. 'It should not be up to me to worry about flyover safety, [but] the government,' he said. Several residents recalled objects previously flying off the flyover. One involved a spare tyre which hit Peony House, and another in which a minibus crashed down the slope.