What is the main danger of over-inflating a BVM?

Over-inflating a Bag-Valve-Mask (BVM) can indeed lead to gastric inflation, which significantly increases the risk of regurgitation. When excessive pressure is applied during ventilation, air can escape into the stomach rather than being effectively delivered into the lungs. This not only reduces the efficiency of ventilation but also introduces the danger of the stomach becoming distended, which can cause fluid and contents to be pushed back up into the esophagus. If regurgitation occurs, there is a high potential for aspiration, which poses serious hazards such as airway obstruction and pulmonary complications.

The other choices, while also associated with potential airway management issues, do not capture the primary and immediate concern regarding the technique of using a BVM. Understanding the dynamics of airway management and effective ventilatory strategies is crucial in emergency situations, and recognizing the risks associated with ventilation techniques like BVM usage is vital for maintaining patient safety.