<p>I've never been able to crack my back.</p>
<p>Cracking my neck is damn satisfying except for those times when it hurts after you crack it cause you stretched it too far... ahh.</p>
<p>When I lay my hands palms-up on a flat surface they naturally curl almost into a fist. I think it has something to do with my cracking my knuckles. I do believe that it makes my joints weaker.</p>