Malaysia (Borneo), Sarawak, Bako National Park, April 2011
In http://en.wikipedia.org/wiki/Reflection_(physics) it is said that "reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves".
So shadow play is not a reflection of light but rather a "reflection" of the lack of light. Therefore, I dare to submit the above picture for Reflection Thursday!