I don't know enough physics to give a proper answer, but I think this example is wrong. I don't think you can measure your speed relative to something moving at

I don't know enough physics to give a proper answer, but I think this example is wrong. I don't think you can measure your speed relative to something moving at the speed of light, because there is no reference frame for the photon to be 'at rest'. Even in the photons own reference frame, it's still moving at c.