Fly-fishing lessons would have paid off last week when Lisa B, Ali Cockayne, Julianne Davis, Anoushka Hempel and Amanda Donohue all gathered at the new Christian Dior fine jewelry store in London's Knightsbridge. Guests were invited to grab a pole, cast a line and reel in a box of jewelry from a bin. But it wasn't so easy. Lynn Wyatt reached her rod as far as she could. "It's bound to be at the back somewhere," she said. It wasn't. "Do we get another go?" she asked, before her rod was snatched away and passed to the next hopeful."