"Oh, that's all water under the ... um."
Three years ago, a 44-year-old man was admitted to hospital in Marseille, France, complaining of weakness in his left leg. He had no idea what doctors would find to be the source of the problem: a huge pocket of fluid where most of his brain ought to be
Look closely at that picture; see the black chunk in the center? That's where his brain isn't.
Ooooh yeah. It's like that.