All of the following conditions may lead to ventilations first CPR EXCEPT:

In emergency medical scenarios, certain conditions can lead to the protocol of providing ventilations before starting CPR. This protocol applies when the victim shows signs of airway obstruction or respiratory failure but may still have a heartbeat.

Burns typically result in damage to the skin and may lead to secondary complications such as shock or respiratory distress if respiratory tracts are involved. However, the primary medical concern with patients suffering from burns is often circulatory compromise rather than immediate respiratory failure, especially if they have a pulse. Thus, in cases of patients who have burns, the sequence of ventilations and CPR may not necessarily prioritize ventilations first.

In contrast, conditions such as hanging, lightning strikes, or toxic inhalation more directly impair breathing or cause immediate respiratory distress. In these cases, the protocol emphasizes addressing ventilation needs first because these injuries may lead to a critical lack of oxygen despite the heart still beating.

Therefore, burns stand out as the correct answer since they do not typically lead to ventilations first CPR as a primary concern, whereas the other conditions mentioned do.