A young woman told yesterday of weakening and feeling her fingers slip as she clung to balcony railings after being thrown by her boyfriend from an 18th-floor flat. Tang Kwok-wai, 27, consumed the drug 'ice' and 'changed totally' in the days leading up to the alleged murder attempt, his girlfriend, Au Wing-sze, 18, told the Court of First Instance. She said she had ignored advice to take Tang to hospital the day before her brush with death. 'He couldn't sleep, he was very suspicious and he asked questions I didn't understand, like whether anyone was eavesdropping, trying to harm us or laying ambush, and so on,' she said. 'He had changed totally . . . I didn't dare speak out.' Tang denies a charge of attempted murder after allegedly throwing the woman from an 18th-floor balcony at Wo Che Estate, Sha Tin, on January 19 this year. The waitress was saved from the fall by a resident on the floor below. 'He [Tang] picked me up and dragged me outside the flat, it was very chaotic, and all of a sudden he said: 'Are you going to tell me what you are trying to hide from me? Believe it or not I will throw you downstairs'. 'I said: 'If you have the guts - do it'.' But she said she never believed he would respond. Tang then tried to remove her clothing, and the couple struggled before he suddenly lifted her up and threw her over the railings, she said. 'I wasn't able to touch anything with my feet. I was holding on to the top horizontal bar with one hand and a vertical bar with the other. 'Then my hand slipped down the vertical bar so that I was holding on to the bottom horizontal bar. 'My boyfriend took one step forward as if he was going to support me . . . he was stretching his arm toward me, but then he said: 'Are you still trying to hide something from me?' 'After he uttered those words he stepped on my hand. He stepped on my hands several times. After that I got weak and my hand slipped . . .' At that point she felt a man reach his hand out from the balcony below and support her. With his help she was able to jump on to the floor below. The day before the incident, Tang had dragged her by her neck into her family's apartment where he produced a knife, she told the court. When she asked one of his friends for advice he told her to take Tang to Prince of Wales Hospital for help, but she did not. The case continues before Mr Justice Colin Jackson.