“POLICE! POLICE! SAT NAV BEING STOLEN!” said the sat nav very loudly.

“Maybe you should take it away from the air horn?” said Jack.

“One hundred and ninety-two miles to destination.”

“Whistle whistle whistle …”

“Why are you still whistling?” said Jack. “Rahul’s idea’s not even working any more! In fact, nothing is working! It’s over! This adventure is over, and we’ve lost!”

“Don’t say that!” said Amy.

“WEEOOOWEEOOOWEEOOO!” said the sat nav.

“Oh great,” said Amy. “Now the sat nav’s making a burglar alarm noise.”

“At least it’s covering up Janet’s whistling,” said Jack.

“Should I put it down?” said Rahul. “Turn it off?”

“Hold on,” said Amy. “Hold your nerve.”

“One hundred and ninety-one miles to destination.”

“Come on, sat nav,” said Amy.

“WEEOOOWEEOOOWEEOOO!”

“Come on. Just stop doing that for a second and remember what your job is. Come on!”

“WEEEOOOWWEEOOOWEEOO – if possible, make a U-turn,” said the sat nav.

The drone stopped. Which meant the TurboChaser stopped. Everyone inside held their breath.

“If possible, make a U-turn.”

The lights on the drone flickered. Almost like two eyes blinking. It was as if it was thinking about it. It hovered there for some time.

“Come on,” said Amy.

“Come on,” said Jack.

“Come on,” said Rahul.

“Whistle whistle whistle,” said Janet.

And then, the drone flew up in the air. Up and around. It did what the sat nav told it to do. It made a U-turn. A big, flowing U-turn – and then it started flying in the opposite direction.

The Taylor TurboChaser followed suit.

“YES!” shouted the children.

“One hundred and ninety-two miles to destination,” said the drone.

“I can’t believe that worked!” said Jack.

“It was a long shot!” said Rahul. “But it did the trick!”

Jack leant over and high-fived Rahul.

“One hundred and ninety-two and a half miles to destination,” said the drone.

“Is it going to be following us all the way to my dad’s now?” said Amy.

“One hundred and ninety-three miles to desti—One hundred and ninety-four miles to desti— Mobilcon going away from destination— Job requirement to go other way— But new instruction to U-turn override— Malfunction! Malfunction!

Malfunction!”

The drone exploded. Tiny bits of it – lights, fans, metal – rained down on the TurboChaser’s roof.

“Don’t think so,” said Jack.

“Please rejoin the route to your destination,” said the sat nav.

“Which one is that?” said Janet.