It makes for a pretty interesting effect if you do like I said in my first post but actually use it as a scene light. If you use shadows on it, it creates a strong sense of depth for anything the camera is looking directly at, as the shadows are all in line with the light. Kinda like the opposite of rim lighting.
And it seems specular highlights will always be facing towards you.

Definitely something you couldn't see in reality, unless you were a flashlight. ;-)