Reading a book, running, or even bungee jumping are all done without changing your state of mind. Natural chemical shifts are not comparable to getting "high" when refering to alcohol or pot. A good test is whether you can stop what you are doing and function in a normal manner withen seconds.

Bungee jumping doesnt change your state of mind? Your still using an artificial stimulus to make these chemical shifts. Also it will take you more than a few seconds to recover from bungee jumping. Heck I even get high on playing VI sometimes. I can smoke pot and do anything I normally do perfectly fine. Two beers and Im useless. Its funny I love the show Law and Order. What do the lawyers , judges and cops do at the end of every case? Why they go out and hoist a few.