And the end of the book it continues on as such: Billy then goes back in time, living again as a child just about to be thrown to the bottom of a pool again. Now he is back in Dresden, moving around bodies as he is ordered. Now he's getting kidnapped by Tralfamadorians. And now he is reading a book in the veteran hospital. This cycle never end for Billy. This is the consequence of being unstuck in time. The only time Billy ever feels free is when he sees that bird again, over and over. Billy does not know why he enjoys this moment, but it is his favorite. It says the same thing every time without fail. "Poo-tee-weet?"