A Star Ferry is hurled hundreds of feet into the air and Hong Kong’s Convention Centre is demolished in a nightmarish scenario as the new Transformers 4 film trailer is released. The action-packed trailer shows one of the city’s iconic, green passenger-boats being sucked into the air as giant robots hover over the harbour. Actor Mark Wahlberg and director Michael Bay spent 10 days shooting scenes for the movie in Hong Kong in October. Special effects experts have since made the film come alive, populating the streets and skies with Autobots doing battle with their enemies. The film crew’s 10-day visit to Hong Kong wasn’t without incident. During shooting for one scene in Quarry Bay, director Michael Bay was attacked with an air conditioner, in what the film studio described as a “bizarre encounter”, with a man attempting to blackmail the crew for HK$100,000. Watch: Transformers: Age of Extinction trailer Bay ducked the attack and the assailant was brought down by a security guard. He was later jailed for 30 months, with a judge saying he had damaged the reputation of Hong Kong. Despite that and another attempt to extort cash, Bay told the South China Morning Post that he planned to return to the city to shoot at least one more film. Filming for the fourth installment was a sizeable undertaking involving at least 100 crew members and a number of huge vehicles shipped to the city for some scenes. Bay told the Post that planning the shoot had taken nine months “Hong Kong was very hard”, he said. “I’ve had difficult locations in my life. But shooting in the market with so many people watching ... it made it very challenging.” The last “Transformers” movie, “Dark of the Moon,” was a big hit in China, grossing US$165 million there.