Sooty, Sweep, and Soo are playing tricks on Matthew. Later, Matthew goes to visit the joke shop to buy some jokes to get revenge on his little friends. At the shops, Simon Smartypants, a television presenter, is waiting. He is filming his show "Giant Jokes" where he plays pranks on members of the public. The "Giant Jokes" team move Matthew's car and replace it with a bike but Simon Smartypants turns out to be a big sourpuss when his joking backfires and his car is given a parking fine. It turns out that the "Giant Jokes" production team had rang Matthew and arranged for him to help play a joke on Simon and Matthew knew that all the business with his disappearing car was a joke.