THis joint is at the very base of the spine and is basically where the spine connects to the pelvis - hard to explain, but it is definitely a vertebral crack I am experiencing. THis is largely the most invigorating crack - it has a sound that comes from deep within my body - I cannot imagine how loud it would be were this joint not covered by a bunch of skin and were it not so deeply buried inside the middle of my body.

I am surprised that it doesn't cause pain - I fear it cracking the wrong way sometime and having ot go the chirporacotr, but I'll take my chances!

I think I am cracking the sacroilliac - here is my routine…

Sit in chair for long duration
Sit up straight and have as much direct downward pressure on your back.
Cross you ankles, and use each foot to pull at the other foot. It gives me a delicious 3 cracks that feel that they are literally inside my a*s. It is wonderful. I can also do this standing up and it freaks people out - i just use each foot and pull them directly away from my body and it snaps - I usually tell people I use the force to crack joints, because I can do it without looking like I am moving at all

TO add a little to this - here is another added benefit - this may be against the terms of this web site, but when my wife and I are uh... enjoying each other... if I am sitting down and she brings me to that magical point, I get the sacroilliac crack right at the "moment" and it just adds immensely to the entire experience.