I've been looking around on info about Tool's album "Lateralus." It turns out Maynard is a genius.
The order of the songs isn't meant to be played one after the other. Instead, it was to be played in the order of a Fibonacci sequence (6,7,5,8,4,9,3,10,2,11,1,12,13). Each song continues on into the next, and the Fibonacci sequence fitting the pattern of a spiral (hence, Lateralus, and their use of spirals in graphic art, concert scenes, and patterns of guitar, drums, and bass using this sequence). The lyrics also continue on through each one of the songs fitting the sequence, hitting key points in between songs that give so much more meaning.
Just thought it was kinda neat :p.
-Kev.