Samantha Ko Hoi Ning in BEAUTY ON DUTY (MEI LAI MUK LING) not only sacrifice her looks with appearances in sexy sleepwear and swimwear but also permitted Charlene Choi Chuek Yin to poke her chest. In the film Ah Sa and Sandra Ng Kwan Yu battled the killer Ko Hoi Ning and fought from the hotel bedroom to the bathroom. They had to put in a lot of energy before they could defeat Ko Hoi Ning. Ah Sa in order to make sure Ko was down poked Ko Hoi Ning with her finger and set off a false alarm.
Ah Sa was asked how Ko Hoi Ning's chest feel. "Wow, actually it really is as soft as cotton and feels pretty good to the hand. However I didn't really dare to use too much force, I was afraid of hurting her. Ko Hoi Ning was very professional though, she had to play dead and hold back her laughter. After this scene our entire team was laughing until our bellies hurt." The film used an alarm for the scene, did Ko Hoi Ning mind? She said, "This is a comedy, as long as the result is funny I of course don't mind. Actually when I watched the premiere, many viewers were cracking up!"