Actually, I believe I had been told that the cracking sound you hear when you bend your fingers/knuckles in such a way, is actually the sound of bubbles of gas between your joints popping. This always seemed logical to me, because in Biology you learn about the different types of gases and acids in the body that build up in certain areas due to movement or lack of movement.
The sound you hear when cracking knuckles is the sound of gas being released in the joints as the presume on them is relieved.
There here is no evidence that popping you knucles does any particular harm.
he is like around 20 or 26
Crack.
Moisture
16 btw he's an echidna
No. A horse has a hoof. Hooves don't have knuckles.
crack
Crack.
pig knucles and mayo sandwich
Glass
classic tails classic amy classic knucles
chicks in high heels