Hmm, let's see if I can explain it better. It sounds weird though, right? haha!
Get on all fours, on your hands and knees like a dog or some such thing.
Arch your back, not up, but down, and look up at the ceiling as best you can. So I guess that could sound like a banana on all fours? LOL! Arching helps the other person to get a better grip on the skin over your spine.
Then get your partner to start from the base of your spine and working up (I usually have him stop just below my shoulder blades), pinching the skin firmly over your spine with two hands and pull up, no pushing down. Think of it as the exact opposite to how people usually have someone crack their back (which is usually pushing down).
So in theory, when your back is all compressed from the stresses of the day (walking, sitting, exercising, so on), I feel the by doing this you are literally pulling compressed discs out and into their original alignment.
I mentioned this to a chiropractor once who said it certainly isn't hurting anything, so no harm no foul.
I usually get a dozen pops or so. The ones near the base are usually just small pops but as you work up, they get LOUDER! Sometimes, if you get a good grip, you can pull two or three vertebrae at once! And yes, you can literally feel individual verts. shifting and popping, so can your partner! It's very, very satisfying!
I recommend it to anyone who can tolerate someone else pulling their back like that. My partner doesn't like it because the pinching/gripping of the skin itself hurts, not the popping. I personally love it and could literally be lifted off of the floor by my skin alone without feeling pain! There is a type of massage I enjoy with the back pulling, it has a real name (Tai Ne? Something weird like that) that involves pinching, pulling, and rolling the skin. It feels WONDERFUL on my back, I can feel my blood circulating and the skin gets hot. Very nice after a tough day.
Aside from my back, I pop the usual: all toes (including the tarsals or whichever of the foot), knees, hips, neck, all of the joint in my fingers (even that teeny joint in my thumbs), my wrists, and jaw. I am also "double jointed" or whatever in all of these places and more.
Also: there is a way to pull your back by yourself if you care to know.
Does anyone else do this? LOL. I am going to guess: No. But maybe you'll give it a try?