Carefully ream out juice or cut out meat with curved grapefruit knife. (bonappetit.com)
Using a small serrated grapefruit knife, remove the lime segments between each membrane, one by one and add to a kitchen machine. (remonline.com)
One of the best scenes has Bogey cutting grapefruit and mistakenly straightening out the curved grapefruit knife, very subtly setting Grahame on edge. (combustiblecelluloid.com)