Is it normal to crack your knees?
At first I would notice that when I bend my knees down and squat as far down as I can go, my knees sometimes would crack. But now it's become a habit just like cracking your knuckles. I also noticed that when i put my foot on a table or desk or something and lean onto it and bend my knee as far as it will go, I get a deeper crack than whenever I squat.