I failed to mention that the shot of the boy and the mountain was taken with a 70-200 2.8 zoomed to 200 on a digital body, and lit with two sb 800s, one on the camera as the trigger, and one on a light stand - that's where the shadow came from. This is antoher option for you, to trigger a flash remotly where you dont have the right conditions for a reflector, or someone to hold it, or the wind is blowing or whatever. . .

here's another example of off camera, remote flash . . . It's a bit different again because of the color of the light, but the client liked it, so I guess it worked. . . Oh, this was shot with a 300 2.8 at f 5.6.