The character in this song is tripping, confused and panicked, which is represented by the bass and drums. The guitar solo is slow and soothing which represents the hospital staff trying to calm him down (is it just me or does the guitar part sound a little like how the adults in Charlie Brown cartoons speak...probably just me). So in my view, the solo is an extremely important part of this song (Tool doesn't put anything into their music that is uneccessary). :)