1 
2
1: For image 1 I made sure that the light was of course behind me and the light was not to distracting, and making sure the background is not to distracting as well, but I made sure the darks were there and really dark so it could make a clean silhouette.
2: For the second image I did pretty much the same thing that I did for the first image, but this one has a different pose and you get a little more out of the background especially with more of the tree coming through which I thought was good and not too distracting to the image as a whole.
Silhouette would be stronger if used side view pose