This is your mouse on drugs
I ran across a pretty cool animation that shows you the various effects of drugs on the brain. The animation uses cute little drugged out mice that you get to put in a special brain seeing machine and the machine tells you all about how that drug works on the central nervous system. Its pretty decent in terms of the information it provides but the best part is probably checking out the various drugged out mice. I like ecstasy mouse myself... hes just sitting there grovin' away.