Make yourself hallucinate, chemical free! I just have two questions? Who was laying around taping half ping pong balls over their eyes while listening to static? And, on the more science-y side, I wonder if, even if these are chemical-free ways too mess with your brain, there could be lasting side effects of doing these types of things repeatedly? How often would you have to rub a friend’s nose before you permanently felt like your own nose was super long?