And yet everything, myself included, seemed to have lost its grip on reality. The tables remained in their usual places, two men were just walking across the cafe, and in front of me I saw the familiar water-jug and match-box. yet in some eerie and alarming way they had all become accidental, as if they happened to be where they were purely by chance, and might just as well be anywhere else.
He was soon diagnosed with a brain tumor, and the book goes on to detail a first person account of early 20th century brain surgery--from the perspective of the patient. For more details, read Sack's great article.