A truck driver was on his way to London Zoo with a lorry load of penguns, when the truck broke down on the motorway. Concerned about his cargo, the driver flagged down another truck driver and persuaded him to take the animals for him to London Zoo.

After getting his own truck repaired, the first driver carried on to London to make sure that the penguins arrived safely.

As he approached the zoo, he was amazed to see the other driver walking along the pavement with all the penguins flapping and tripping along behind him.

"You were supposed to take those penguins to the zoo!" shouted the first driver.

"And I did," said the second. "Now we're going to the movies."