After an awesomse day at work (because there were only six people there and no bosses), with your neck and shoulders aching from hauling 800 books back and forth to finally complete organization of the library, do not practice your mad dance moves.
I know, I know, you have Tuesday off (yay Fourth!) AND Wednesday. And you really wanted to make pina coladas and yes, they were tasty. But don't turn on the merengue mix CD.
You just effed up your knee by kneeling on your bed wrong. You seriously want to make it worse?
Oh yes, Suavamente, you fucking love to dance to that one!
Well great, you just cracked your knee weirdly and now it's all sharp and wrong and hurts.