system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do you have to wait a while before cracking your knuckles a second time?

I just dont get what exactly happens during the time period of cracking your knuckles and being able to crack your knuckles again.
gpt
When you crack your knuckles (or anything that cracks, really), you're expanding the area inside the joint, which is full of sinovial fluid (natural lube). As the volume expands, gasses in the fluid cavitate and come out of solution and make a pop sound as they rapidly expand.

The 'wait' is because you have to wait for the gasses to dissolve into the fluid again.