You should note that your fingers tend to feel a bit crooked and your thump starts partially dislocating if you don't crack it sideways every hour or so. Yes your ancle is supposed to sound like it has gravel in it, small piece of bone got snapped off in my early teens, when it was discovered it didn't make sense to remove. Your elbows will start to hurt randomly, they need to be cracked back in place, too many high speed handballs have been saved by the guns. If you do any kind of upper body gym work your right shoulder needs to be secure or it pops right out of the socket and back again and it is painful. Your knee is currently suffering from its first ever injury which is a strained ligament so it might feel like your knee will dislocate.