How did you do it? I do it by pushing the base of my thumb down and backwards, and I feel the crack right at the base of my wrist towards the side of the thumb. I suspect I'm actually cracking my thumb, since I'm pushing on my thumb's metacarpal, but I feel it in my wrist.
I can't crack all joints, but I can crack many. The elbow is the most consistent, but I can crack my knees, most toes and I can also crack my wrist by pulling my thumb backwards.