Thank you! I've heard kicker, backlight and rim used almost interchangeably. It's good to hear a clear position explanation.
It makes me think that my problem is with intensity. When I tried to do this, I walked the light in to make it stronger, but it ended up spreading all over the cheek of the subject. Too soft, even though it was a focused fresnel. I figured this is a problem with the apparent light source growing in size, making the source appear softer.
Does the instrument have to be very intense and distant from the subject for this to work? Or very close and small?
Still working out these basics, thanks for the help!