An amusing prank video has emerged from Australia of a self-styled "nutty professor" father electrifying his daughter's chair to stop her rocking on it.<br /><br />In the video, which was filmed on August 15, science teacher Jacob Strickling connects the parts from a bug zapper to his daughter's chair. <br /><br />When the chair is rocked, an aluminium foil ball swings into a contact switch, completing the circuit.<br /><br />This then triggers a high voltage between two thin wires on the seat of the chair.<br /><br />When Jabob's daughter then rocks the chair, she receives a small electric shock, enough to make her stop rocking but not enough to do any lasting damage.<br /><br />"Are your kids always rocking on their chairs? Mine are, and it drives me crazy!" Strickling wrote online
