Kevin Cheng Ka Wing and Roger Kwok Chun On were filming "Walking with the Enemy" 《與敵同 行》on a 13-story building roof top. In the series, both Kevin and Roger have hidden agendas, as Andy Lau and Tony Leung possessed in "Infernal Affairs."
After leaving prison, Kevin's character wanted to seek revenge on Roger. Testing Roger's intentions, Kevin pretended to jump off the building roof top. Kevin dangerously sat on the ledge of the roof, which did not have a rail around it. Despite the presence of the stunt team and safety wires, Kevin was very nervous during filming.
Under the high temperatures, the sun melted the asphalt. Kevin and Roger's shoes tracked in the asphalt.
Kevin said, "I was not afraid while sitting on the ledge of the rooftop. There were safety wires and I do not have acrophobia. Sitting there for a short time was fine."
Kevin's courage stemmed from filming《越野狂奔》in Australia last year. "In the past, I didn't film a lot of height scenes. That time, I had a parachute scene and I also had rush down a vertical cliff, which was a dozen feet high. I realized I can handle these scenes." The dangerous stunts were not difficult to handle, but Kevin felt pressure in his desire to act better in the scene.
Roger's character is a vicious villian in the series. Since the character's personality differs so much from Roger's real life personality, the role gave Roger mental stress.
"It's been a long time since I couldn't sleep over a role. I had to get up in the middle of the night to read a book and watch TV. My wife, Cindy Au even had to make a ham and cheese sandwich for me to eat. She said that it is easier to fall asleep with a full stomach."
"Sometimes I will also wake her up to chat," Roger boasted of his marriage with Cindy.
(credits to jaynestars)