"I'm trying to get a bit fitter," said the overweight man. "I got one of those rowing machines for Christmas. I've set it up in front of the telly. I'm taking it fairly easy at first: only a mile a day."
"That's a good start, though!" said his friend encouragingly.
"The little computer thing says it's enough to burn up eight calories," said the man, taking another swig from his can of 7 Up.