You might have noticed that in most of the stills the flashlights aren't lighting the actors, that's other lighting. Light from a flashlight is moving away from the person holding it. So unless there is something for the light to bounce off of and back into the faces of the people with the flashlights, they won't be lit much. As David points out, you could hide sheets or bounce cards on the ground and allow the light to bounce back up. The scenes you used as examples have several other sources other than the flashlight itself. The second still has a soft light coming down from above and the next two stills have a hard light coming up on the actor from below. There is also a lot of light in the background to keep it from going black and there are those white references shining directly into the camera.
If you are doing a woods scene you can always use the moonlight as a source. The Moon is actually a hard source of light that throws shadows - something you'll notice if you go camping or ever go on a cruise ship. It can become quite bright when the moon is full. Since its 5600k it appears bluish to the eye when compared to the warm 2700k color of a tungsten flashlight. What you could do is use some open-faced mickies (1ks) or mighties (2ks) with half blue on them and shine them down into the wooded area to imitate moonlight. Shining through branches will give you a nice break up. Use powerful flashlights as your props, but you can also add inexpensive LED lights, the kind that strap to you head, and strap them to the actors waist below the frame aimed up into their face - as if the flashlight were shining up on them. That appears to be the method used in your last two stills.
You can go a variety of looks for night time in the woods. You can let the backgrounds go totally black and give the feeling of the characters being closed in and alone – or you can backlight the trees making them looking “trapped” or surrounded. You can also light it so you can see into the background beyond the trees, making them lost in the wide open spaces. It’s an artistic choice you’ll need to make, talking with the director. Have fun.
Edited by David Landau, 23 November 2014 - 11:15 PM.