The Whistle Blower by O'Grady CreationsLong awaited to the Modern Practical Joke Range is The Whistle Blower by O'Grady Creations. After the ongoing success of his Divers Lung Tester, Jordan O'Grady has managed to redesign the workings of his bespoke prank prop and hide them in what appears to be an everyday survival whistle. Completely self contained, The Whistle Blower does everything the Divers Lung Tester does, but with the added advantage of being able to fit into a pocket. You will