A subcontractor’s Jack Hammer Operator was manually shifting the heavy (43 Kg) jack hammer on his shoulder for Function test to be carried out at the Testing yard. While lowering the jack hammer, Operator’s left hand got crushed between the handle and the floor resulting in a crush injury. After administering first aid, the employee was shifted to Salalah for further treatment where fracture was diagnosed to his metacarpal area. The area Supervisor failed to intervene the unsafe act carried out by the employee without using hand gloves.