Those who fart with their hands imitate the sound of farting with their hands. This action is that people imitate the sound of farting with their hands. So it's called hitting the arm. The specific method is to combine hands 10. Then suddenly a vacuum was drawn, and it sounded like fart. Of course, there are other explanations, and I think this explanation is a more reasonable one. Other explanations can also be explained as imitating p's voice by hand.
Flapping fart is a joke derived from nonsense funny short films. This film is a typical nonsense series. Stanley, a China guy who looks as healthy as ordinary people, actually suffers from a rare disease that is extremely dangerous and difficult to cure: "One more slap will kill you." But in the end, I couldn't hold back and died.
The gripping rescue, the nurse's sad persuasion, and finally the doctor's crying all look like a serious medical drama festival. But it is telling a nonsense story, but the whole short film is expressing a very simple truth: "A person's fate is in his own hands." At the beginning, I quoted Laozi as saying: because you are not self-sufficient, you can become great.