A 22-year-old construction worker sustained a nail gun injury that caused a 5-cm nail to penetrate his right ventricle. An CT scan showed the nail in the right ventricle as well as a blood clot in the pulmonary artery. The patient was taken urgently to surgery where the nail was removed and the ventricle repaired. During surgery, a 3-cm blood clot was also removed from the right ventricular outflow tract. The patient was successfully weaned from bypass and had an uneventful recovery.