[se5a]

sooo...
the speed of light IS a frame of reference?

if I have a torch (flashlight) moving at 0.5c and I turn it on, the light from the torch would be moving at c right?
but, ralitive to the torch the beam is moving at 0.5c or 1.5c depending on weither the torch is facing forwards or backwards.

what narf is saying, is if you use said torch, and mesure the amount of time it takes for light to get from the torch to an known distance, you should be able to work out how fast, and in what direction the torch is moving, and therefore be able to say what "still" is.