Another crackly troper. Two knuckles on each finger, the base thumb joint forwards and where it connects to the wrist backwards, wrists bent back and pulled out, elbows, neck in four different ways, jaw in three, upper spine, lower spine in four or five, knees in two each, and toes. I can also make a lot of clicking and crackling noises repeatedly from moving joints in ways they're not supposed to. I also have
some joint problems.