A WATCH thief feared his appeal hearing in court would involve interrogation under hypnosis. Yang Chun-shing said he had learnt about such tactics from the media. But Mr Justice Duffy told the thief: 'I'm not going to put you in a hypnotic trance and ask you questions, so you need not worry about that.' Last September, Yang, 32, was found guilty of theft and fined $5,000. The electrician appeared in the High Court yesterday and lost his appeal against the magistrate's conviction. When Mr Justice Duffy pointed out that Yang had changed his story three times, Yang said he had been frightened into lying when police threatened to mobilise Interpol against him. He was arrested near Hunghom KCR station on June 7 when officers searched him and found a Rolex watch stuffed in the front pocket of his trousers. Yang claimed he found it on the floor of the train compartment as the KCR rolled into the station. The mainlander told the officers he planned to take it back to Shenzhen and sell it. But he later retracted the story and said the watch belonged to a friend and that he was bringing it to Hong Kong for repairs. Yang changed his tale a third time, claiming he bought the watch.