It's like the joint is about to crack…but then it doesn't and it just feels crummy as h**l. I get that if i'm cracking a joint slowly. I used to get it in my fingers, but I guess I'm past that now (years and years past that). :roll:

I don't agree with popping elbows or knees, there's too much going on in there, and it freaks me out about 30%.

My knees never used to crack, but now they do it fairly often. My right knee sometimes goes somewhere it shouldn't. It feels like it's off-center and that something is stuck in there. It's not generally painful, but it is very annoying. I kick forward with my foot to the right and then, at the top of the kick, I swing my foot to the left like cracking a whip. It takes normally two to three shots to get it, it only fixes it about half of the time. When things work out it pops back into place and feels nice (especially after feeling like having a tampon stuck in my knee joint for however long).

What I especially don't dig are the people who crack things really fast, like it's an agressive sport.

Sometimes fast is the only way to get it. I do the joint between my metacarpal thumb bones and their carpal bones. It's either fast or unpleasant. With my knees it's fast or not at all. Mind you I hardly look agressive when I do my knees, I probably look like I'm nuts or having a stroke or something.

http://www.apta.org/AM/Images/APTAIMAGES/ContentImages/ptandbody/hand/hand-bones.gif