what makes the sound...

[extreme_gamer]

what makes the sound of your knuckles cracking when you crack your knuckles?

(some science extra-credit question)

[BadBadNeil]

i thought it was the pressure being released between the cartilidge and bone

[extreme_gamer]

that's the best thought so far, :D

thats might be right for all i know

[landwire]

It is air being released. While we are at it, the white half circle under your finger nails is also air. It is called the "luna". Contrary to urbam legends, cracking your nuckles has not be proven to cause arthrightis (sorry for spelling)

[leprechaun_40]

Actually, it's a small sonic boom created by the bubbles in the synovial fluid (liquid in the joint) popping when you do the Pop of the joint.:eek:

[extreme_gamer]

so it's not harmful? and, it's just popping synovial fluid, correct?

[landwire]

I would say that it is not harmful. If it is, I think more people would know about.

[leprechaun_40]

Nope, popping the knuckles hasn't been shown to do any damage.:cool:

[Billforce]

Popping your knuckles on someone elses head may result in severe complications of your nasal member though.:r :r

[Bizkitkid2001]

Originally posted by landwire
It is air being released. While we are at it, the white half circle under your finger nails is also air. It is called the "luna". Contrary to urbam legends, cracking your nuckles has not be proven to cause arthrightis (sorry for spelling)


I thought the half circle was skin? Well thats what it was when I ripped off my finder nail:eek: Just a pile of skin. Or is it skin filled with air?:D

[landwire]

I don't know. Discovery channel did not go into that much detail. Sorry :-(