Penetrating abdominal injuries can be life-threatening and require prompt recognition and surgical intervention. We present the case of a 48-year-old male patient who presented to the emergency department with abdominal pain that began while mowing his lawn just before arrival but without any external signs of trauma. Point-of-care ultrasound revealed a possible linear hyperechoic foreign body just beneath the abdominal wall, a finding confirmed by computed tomography. The foreign body was subsequently retrieved in the operating room, and the patient had an excellent recovery. This type of abdominal injury mechanism is rarely documented in the literature. Relevant topics discussed include the incidence and burden of lawn mower injuries, their similarity to other projectile injuries, and potential challenges in diagnosing and managing such cases.