When you crack your knuckles, gas is released. Where does this gas come from, and more importantly where does it “go” when cracked?

Question

When you crack your knuckles, gas is released. Where does this gas come from, and more importantly where does it “go” when cracked?

In: 100

Answer 1

This is clearly something we care a great deal about:

https://arstechnica.com/science/2018/04/new-model-offers-snappy-explanation-of-knuckle-cracking/