Pneumoperitoneum is most commonly associated with a perforated viscus. When free air is seen on imaging, the most common course of action is an emergent exploratory laparotomy. However, pneumoperitoneum may not always be indicative of a perforated bowel. In the case described below, we will discuss a patient who developed acute peritonitis and pneumoperitoneum after undergoing chest compressions during cardiopulmonary resuscitation (CPR) and positive pressure mechanical ventilation.