Twenty minutes later , Gemma and Derik were trying to find the oil because the sky skips engine was faulty . Mrs Coulter was waiting around for the oil when Darren and Pauleen came crashing through the door. Mrs Coulter questioned why they ran through the door and there was no answer they ran back out without a trace. There was a note which stated there was a bounty on there ship and sky dragons were after them . Gemma and Derik came back with the oil and gave it to Mrs Coulter she handed them the note in return and went off to fix the engine . Gemma looked at the door and saw a big puff of smoke they both stopped and looked at each other …