SPOONA concave area cut into the deck. On longboards it is usually in the front third of the board to reduce weight, though step deck s are more common. In kneeboards, the entire deck may be concave to keep the rider in position and allow a lower center of gravity. In extreme cases the entire deck area is eliminated so the kneeboard can flex to enhance performance. http://www.swaylocks.com/images/glossary/uploads/grossvelo.jpg *Shown; a Paul Gross-shaped flex spoon kneeboard on the George Greenough Velo model. More at http://www.swaylocks.com/resources/Detailed/445.html and other similar spoon kneeboards in the