How To Hallucinate Without Drugs ( Top 10 )

........10. Drumming 
Tribal drumming is a traditional ritual technique used by shamans to enter the spiritual world. The practice is thousands of years old and is passed down the generations as a way of keeping in contact with their ancestors or seeking healing advice. The repetitive nature of tribal drumming is key to the hallucinations it can produce. The short repetitive sequencing in tribal drumming reduces the amount of sensory input and encourages the brain to generate images and feelings which are spiritual or mystical in nature. Earl Vickers wrote a nice article about tribal drumming, music and consciousness which you can read about here (musicandconsciousness)