As Chen Mo had guessed, Gao Yuan, who had come from a special forces background and had once worked as a diver, sensed that something was wrong even before the oxygen masks dropped.
While everyone else grew drowsy from oxygen deprivation or even lost consciousness, his mind remained relatively clear.
During the plane's ascent, all the flight attendants and passengers were seated in their assigned places with their seatbelts fastened, so at first he did not notice that many passengers had passed out.
It was not until he began to have trouble breathing and his head felt heavy and muddled that he suddenly became alert and hurriedly looked around the cabin.
He soon discovered that many passengers were slumped with their heads down, unresponsive.
The plane had only just taken off and was still climbing. Under normal circumstances, most passengers would be chatting or playing on their phones at this point. It would never be this quiet. Even those who were still awake looked drowsy, as though they could pass out at any moment.
Gao Yuan immediately realized that the cabin had most likely depressurized!
As a flight attendant, he knew very well how dangerous cabin depressurization was.
Soon after, with the oxygen concentration in the cabin too low, all the oxygen masks above the seats dropped down. Gao Yuan hurriedly told all the passengers to put on their masks, then got up and placed masks over the faces of several unconscious passengers nearby.
However, his endurance was only slightly better than that of an ordinary person. Before long, dizzy and unsteady on his feet, he had no choice but to return to his seat and put on an oxygen mask.
Under normal circumstances, when the oxygen masks deployed, an alarm would sound in the cockpit. The captain would quickly