When you're cruising down the road in the fast lane and you lazily sail past a few hard-driving cars and are feeling pretty pleased with yourself and then accidently change down from fourth to first instead of third thus making your engine leap out of your hood in a rather ugly mess, it tends to throw you off stride in much the same way that this remark threw Ford Prefect off his.
Douglas AdamsInsofar as she recognized at all that she was dreaming, she realized that she must be exploring her subconscious mind. She had heard it said that humans are supposed only to use about a tenth of their brains, and that no one was really clear what the other nine tenths were for, but she had certainly never heard it suggested that they were used for storing penguins.
Douglas Adams