system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What's going on with my body when I'm laughing so hard but no sound comes out?
gpt
When you're laughing so hard but no sound is made, your diaphragm is contracting in the laughing motion but, your lungs don't have enough air to stimulate the vocal cords. Probably because you laughed it all out! Either that or you're holding in the air. If you let the air out, or have sufficient air in the lungs, you will make a sound!

Think of squeezing an empty whoopy cushion, not gonna do much. Fill it with air? FOOOWOOOMP!