http://www.ted.com/index.php/talks/jill_bolte_taylor_s_powerful_stroke_of_insight.html
This video is a talk given by a brain scientist who had a stroke and analysed what was going on as she was having the stroke. That is fascinating enough but then she talks about what happened to her as her left side of her brain gave out and the experience she had and it sounds scaringly similar to what people experience when they have near death experiences.