"I have detected," he said, "disturbances in the wash." ... Arthur asked him to repeat what he had just said because he hadn't quite understood his m… - Douglas Adams

"I have detected," he said, "disturbances in the wash."
...
Arthur asked him to repeat what he had just said because he hadn't quite understood his meaning. Ford repeated it.
"The wash?" said Arthur.
"The space time wash," said Ford.
Arthur nodded, and then cleared his throat.
"Are we talking about," he asked cautiously, "some sort of Vogon laundromat, or what are we talking about?"
"Eddies," said Ford, "in the space-time continuum."
"Ah," nodded Arthur, "is he. Is he."
...
"What?" said Ford.
"Er, who," said Arthur, "is Eddy, then, exactly, then?"
Ford looked angrily at him.
"Will you listen?" he snapped.
"I have been listening," said Arthur, "but I'm not sure it's helped."
Ford grasped him by the lapels of his dressing gown and spoke to him as slowly and distinctly and patiently as if he were somebody from the telephone company accounts department.
"There seems..." he said, "to be some pools..." he said, "of instability," he said, "in the fabric..." he said.
Arthur looked foolishly at the cloth of his dressing gown where Ford was holding it. Ford swept on before Arthur could turn the foolish look into a foolish remark.
"...in the fabric of space-time," he said.
"Ah, that," said Arthur.
"Yes, that," confirmed Ford.
They stood there alone on a hill on prehistoric Earth and stared each other resolutely in the face.
"And it's done what?" said Arthur.
"It," said Ford, "has developed pools of instability."
"Has it," said Arthur, his eyes not wavering for a moment
"It has," said Ford, with the similar degree of ocular immobility.
"Good," said Arthur.
"See?" said Ford.
"No," said Arthur.
There was a quiet pause.
...
"Arthur," said Ford.
"Hello? Yes?" said Arthur.
"Just believe everything I tell you, and it will all be very, very simple."
"Ah, well, I'm not sure I believe that."
They sat down and composed their thoughts.
Ford got out his Sub-Etha Sens-O-Matic. It was making vague humming noises and a tiny light on it was flickering faintly.
"Flat battery?" said Arthur.
"No,