Does it look like P90x threw up on my floor? I did the balance and power dvd. Made my back hurt. A lot. The exercises didn't seem too terribly bad at the time; but then again, I'm modifying just about every move. Today, it's back to the core dvd which has a ton of floor work. I still dread floor work because I'm so out of shape but I have to tell myself that one day it will be easy for me!