Ryan, when we are in our "normal" state (say drug-free), we are able to directly observe that our will in action. For instance, I want to type this reply to you. My brain sends out specific messages to my fingers and hands. Furthermore, my brain creates syntax, so that I may try to communicate effectively. I think, therefore I do. The will's effects are observable and seemingly unobstructed.
Now suppose you smoke marijuana. You get high. Your will's ability to command bodily movement is slightly impaired. This is the observable effect. You do not perceive a distinct reality, nor has reality changed. The only observable phenominon that has changed has been your will.
My schedule is hectic today, but I would like to continue this debate tomorrow night, when I have more time to research--instead of extemporaneous thought.
Do me a favor Ryan (and others who are interested in this debate), keep this thread near the top until tomorrow night.