Date Time Exclusion zones a must, says WorkSafe, after man gets shot in heart by a nail WorkSafe is today reminding businesses of the importance of adequate risk assessments and exclusion zones, after a worker was shot in the chest with a nail gun. Sleepwell (NZ) Limited makes mattresses and bed bases at a plant in South Auckland. In September 2019 a worker went to free a coil hose that connected his nail gun to the air supply line when the gun recoiled, firing a nail into the chest of another worker who was walking behind him. The nail lodged into the worker’s heart and had to be surgically removed.