The next day he walked excitedly to the harbour and soon he was on his way out to sea. Sunddenly the captain switched off the engine. Some sharks had been spotted swimming near the boat.he put on his wetsuit and stepped carefull inside the cage that would take him underwater and protect him from any attack.sinking through shark-infested waters,trapped in a cage,is not everyone's idea of fun,but oliver was absolutely thrilled!he