Benny Shanon of the Hebrew University of Jerusalem says that Moses was probably high when he saw the "burning bush." Citing his own experiences with South American psychotropics, Shanon thinks that Moses might have been drinking a concoction based on bark of the acacia tree, which is frequently mentioned in the Bible. It's also an ingredient in Fresca and Barq's Root Beer. Of course, smoking Acacia bark is also thought to keep demons and ghosts away, so God was not likely in his/her Holy Ghost incarnation. One variety of the plant is also good for treating premature ejaculation. Moses did have a thing with his staff, didn't he?