He wondered what kind of life it would be, having to keep swimming all the time to stay exactly in the same place. Pretty similar to his own, he decided.

Can you swim?" said Victor. One of the cavern's rotting pillars crashed down behind them. From the pit itself came a terrible wailing.
"Not very well," said Ginger.
"Me neither," he said. The commotion behind them was getting worse.
"Still," he said, taking her hand. "We could look on this as a great opportunity to improve really quickly.

What do you call those things you find at the bottom of rivers? Frogs? Stones? Unsuccessful Gangsters?

I spent six hours becoming one with a shrubbery last night. There were three cloudbursts and a rain of small and very confused frogs

It cannot be said often enough that science fiction as a genre is incredibly educational - and I'm speaking the written science fiction, not 'Star Trek.' Science fiction writers tend to fill their books if they're clever with little bits of interesting stuff and real stuff.

You can't remember the plot of the Dr Who movie because it didn't have one, just a lot of plot holes strung together. It did have a lot of flashing lights, though.