I'm going to bend your mind a bit - click this link if you want that :3

[LostReality33]

From the person who brought you this video: 

TOOL's 3rd LP Lateralus was released 5/15/01, in which Maynard sings, "THE WORLD MUST FEEL THIS SEPTEMBER ELEVEN" on the 3rd song when played backwards. More irrefutable proof of important messages being there, available, just waiting to be found in reverse.  3∆3

I now present you with the following: 

WARNING - NOT FOR THOSE WEAK IN SPIRIT, DOWN IN LUCK, EASILY ANGERED BY HARSH TRUTHS - VIEWER DISCRETION IS ADVISED 

[Mister Obvious]

Some of the supposed reversal lyrics in the first video definitely sound accurate, but the part about "September Eleven", the "September" part is clear but the "Eleven" part is a stretch.

I think what a lot of people aren't clear on is whether these messages are subconscious expressions, as in they weren't actually planned consciously to come through that way, or if they are conscious and intentional messages put in the song. Many of the examples I have heard of CLEAR reversed speech in songs have been completely on purpose, put in there consciously.

These messages coming through in a subconscious manner, as a warning message from higher power or higher consciousness, is not the explanation most people default to. They default to the idea that these messages are put in purposely, and consciously... which is, of course, incredibly menacing.