Sean Lau Ching Wan, Huang Xiaoming, Alex Fong Chung Shun, Michelle Ye (Yip Shuen), Fiona Sit Hoi Kei, Nina Paw Hee Ching, Michelle Wai Si Nga, Bonnie Xian (Sin Sik Lai) and Paulyn Sun Kai Kwan attended the Insanity press conference yesterday.
Sean Lau played a schizophrenia patient in the film who beat his onscreen wife to death, played by Michelle Ye.
Michelle Ye's character was even tossed out onto the streets.
Sean said he was unwilling to even think of hitting Michelle during the shoot.
During the press conference, Michelle pulled up her right sleeve and the bruises could still be clearly seen.
Sean pointed out that this time was the first time he hit a woman in his film career and it would be his last time.
From now on he would not do it again. Sean said, "I am very afraid of hitting people, especially women; I feel very uneasy inside. Not only in real life I have never hit a woman, I have never done it either on film.
"This scene took 4 days to shoot, every time I would ask Michelle to use more padding because I couldn't hold back.
"Showing mercy would make the scene not realistic enough.
"After every shot I would feel where the pads were on his body, as I was very afraid of hurting her."