There was a study that came out last year that tested those who have "religious" experiences. They did a blind test and dosed some participants that attended church services. Some were already religious and other were not. The study showed that many felt like they had a super special connection/experience that day like no other. I know it's out there somewhere, i can't seem to find it right now.
In the meantime, here are some interesting links that discuss mushrooms and their enlightening effects on people:
http://deoxy.org/bmushrmd.htm
http://www.egodeath.com/amanita.htm
http://www.freedomdomain.com/relig.htm
http://www.botany.hawaii.edu/faculty/wong/BOT135/Lect20b.htm
Mushrooms (Particularly Aminita Muscaria) : Yes these little things were also quite a wonder. Where did they come from. The ancient people had no immediate concept of spores. So a mushroom was considered a "virgin birth".
Also they immediately noticed that mushrooms came after the rains and they would pick them in the early hours of the morning. This was the "MANNA
FROM HEAVEN" that the Israelites would gather. The word "Manna" means "What is it". Well, after consuming it you would probably be wondering "What is it" as you were talking to God.
(Gen 3:3 KJV) "But of the fruit of the tree which is in the midst of the garden, God hath said, Ye shall not eat of it, neither shall ye touch it,
lest ye die." (Gen 3:4 KJV) "And the serpent said unto the woman, Ye shall not surely die:" (Gen 3:5 KJV) "For God doth know that in the day ye eat
thereof, then your eyes shall be opened, and ye shall be as gods, knowing good and evil."