Side effects

This really is the sort of thing you'd expect to come across in one of Oliver Sacks' books. According to a news report a man in the US underwent a curious transformation after sustaining a head injury.

Amato was swimming with a few friends when he took a dive into the pool. He doesn’t remember much of what happened next, except that he hit his head on the bottom — hard...About two weeks later, he went to visit a friend. There, as he was waiting, Amato sat down at his friend’s piano just to “screw around.” “That’s when I just went bonkers,” he said.

Link.