As soon as the students had solved the puzzle they heard a very strange voice repeating,
“Take an elevator. Take an elevator.”
The students turned around to see who had said it, but the only thing they saw was Cocoa the class guinea-pig sitting in her cage munching on an apple…
“Hey, I didn’t know that Cocoa could talk,” said Serena with surprise.
“Neither did I, and no one ever told me about any elevator either!” said David.
Cocoa can’t talk, and there is no elevator!” cried Hannah, “We’ll never escape!”