by Alice Peart
You are sitting at your desk reading your email. Nothing particularly exciting or irritating turns up in your inbox. Or, maybe you are packing up the car for a family outing, looking forward to a fun filled Sunday afternoon. Suddenly, and without warning, bright, jagged edged lights appear in your line of vision. Closing your eyes you can see the outline of a pattern that stands out from the black background. There's no pain, yet, but you know it's coming. Over the next few minutes...