Always a fun way to achieve a very dramatic look. Mixing flash and daylight can allow you to shoot in dark or back-lit situations and get results that would other wise never exist. Being able to control your subjects exposure separate from the "scene" allows for pushing and pulling of your subject from the background.
In these scenes I was shooting with between one & three heads with an Octi or umbrellas. The light source for the most part are Profoto 7B packs.