For all those people who own this effect and perform it, is it really dangerous? What are the risks and and precautions I should know about? Do you need something special to accomplish the effect? Can you do it on a regular basis or is there a point where you have to stop performing it before any complications arise? Lastly, what are the limitations? By that I mean can it be handled by anybody, what do I need in order to do it? Sorry for the mouthful of questions but I'd appreciate it if someone could answer them all. Also, if the question is bordering on exposure, don't answer. I've been looking into this effect for some time now but needed some answers to things I'm worried about. PS. I am not a smoker, hence I don't smoke. If that counts for something.