I recently found that when I was about to cry, there were tears in my eyes, and then I listened to songs, especially sad music, and then I laughed loudly. That's a kind of laughter.
When the mood fluctuates greatly, it is very vulnerable to external factors.
Crying and laughing are the external manifestations of breaking through the inner endurance.
Many things will make you more mature and rational after you have hurt yourself and laughed. Although I like my naive self very much.