30 yr old female presented with fall from height. She suffered closed fracture shaft of femur left side at prox 1/3^rd amd mid 1/3^rd junction. The fracture was badly comminuted, without overlying wound (closed), and without any distal neurovascular deficit. After stabilizing the patient, she was taken to operation theatre. Traction was given on fracture table, under spinal anesthesia. The fracture was reduced closed. Beaded guide wire was inserted from entry point in piriformis fossa and reaming was done. Zimmer femur nail was inserted in GK mode and 2 proximal – 2 distal screws inserted. GK mode allows us to fix such proximal fractures which cannot be fixed using conventional femur nails. Other option that could have been used was RECON nail but given a choice GK nails are preferred. RECON nails are technically more demanding, more radiation exposure in there, surgical time is increased, and a theoretical risk to blood supply of head of femur is there. Therefore for such fractures, GK nails are best. Adequate alignment was achieved and fracture fixed stably. Fracture union is demonstrated in sequential x rays. Another significant point is importance of fixing comminuted fractures with nail rather than plate fixation. There is no loss of hematoma, no loss of  soft tissue attachment of small fragments and minimal blood loss, all contributing to increased chances of union without need of bone grafting.