They never go back together the way you want them to, do they.
I had to pull my rocks out of my first saltwater tank for reasons I have since forgotten. It was a bit disturbing to find my blue chromis laying on the carpet once I put the last piece of rock back in the tank. The fish must have run for cover into one of the holes in the rock as I was pulling it out. I was pretty surprised that the fish "sprang" back to life shortly after I put it back in the tank.