Prince William, Duke of Cambridge has his ear pulled by a friend as he and &lt;a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Catherine+-+Herzogin+von+Cambridge&amp;family=editorial&amp;specificpeople=542588 ng-click='$event.stopPropagation()'&gt;Catherine&lt;/a&gt;, Duchess of Cambridge watch the racing on Day 4 of The Cheltenham Festival at Cheltenham Racecourse on March 15, 2013 in London, England.