AOL, it was a stroke. I recently had cause to learn a _little_ about them, when my Dad died of one. AFAIK, about 80% of strokes are "ischaemic": due to a blood clot, brought in from elsewhere, interupting blood feed to part of the brain. A similar effect can be caused by the other 20%, where a rupture allows blood to leak into the inter-cellular spaces. (NB: I am not a doctor.)