"Xu Qingfan, can you answer this question? If the elevator you're riding in suddenly malfunctions and starts to fall, what is the most correct course of action?"
In the last physics class of the afternoon, Xu Qingfan was called on to answer a question.
The previously drowsy female classmate suddenly heard the name she cared about and perked up instantly.
Xu Qingfan stood up from his seat, holding his workbook in one hand, and answered, "For this question choose B, quickly press all the floor and alarm buttons, while keeping your body in a half-squat to mitigate the potential great impact force that might come."
"Ah?"
Clearly, not many in the class had chosen B, so as soon as he finished speaking, a chorus of surprised "ah"s filled the room.
Xu Qingfan smiled and continued, "Nobody chose A, did they? Jumping up at the moment before the elevator hits the ground to try to reduce the speed of descent?"
"Otherwise, doesn't it seem very reasonable?"
