Traumatic dislocation of the testicle is a rare injury generally resulting from severe scrotal trauma and displacement of the testicle into the subcutaneous tissue surrounding the external inguinal ring. The authors report here the extremely unusual case of an abdominal dislocation of the testicle in a young patient with an indirect inguinal hernia. In addition this case is particularly atypical in that the injury resulted from a trivial blow to the scrotum. A new mechanism involving preloading of the cremaster muscle as the source of the dislocation is postulated.