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David Monaghan, 10, of Pleasant Hill, presses down to secure duct tape onto his boat named "John, cousin to Jaws" while competing in the 5th annual Derby Day Race at Pleasant Hill Aquatic Park in Pleasant Hill, Calif., on Friday, July 13, 2012. Ten boats competed in the event. The only rules are that the boats be made of recycleable materials and duct tape. Monaghan's boat won the Titanic award for sinking the fastest. (Jose Carlos Fajardo/Staff)

JOSE CARLOS FAJARDO/Staff photos

Friday the 13th was lucky for Brian Kerfs, 16, front, and his brother, Jeremy, 18, both of Pleasant Hill, top, who took first place at the fifth annual Derby Day boat race at Pleasant Hill Aquatic Park. Ten boats competed in the event, and all had to follow the simple requirements: that the boats be made only of cardboard, recyclable materials and duct tape. The Kerfs won using a refrigerator box. Dressed for the fun, Marco Ortega, 8, of Concord, left, does his best to waterproof his cardboard shark fin hat with lots of duct tape. For all their preparation, right photo, Ivanna Tran, 13, of Pittsburg, left, and Keri Monaghan, 13, of Pleasant Hill, suffer a watery end as their rubber duckie boat sinks during their race across the pool. But not all was lost as their boat won for the most creative design.


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