Unusual injury due to impaction of a clenched wrist against a hard surface causing the hamate to be the cleeved in coronal plane by the 5th metacarpal base. Typically these fracture dislocations are associated with a further impaction injury/fracture to the 4th metacarpal base (against the distal capitate). The more common hamate fracture involves an avulsion of the hook occurring in professional golfers and racquet sports.