Here's a technique for all those that suffer from anxiety while high. While stoned, one reason I noticed that getting high can be scary is because it makes you more present. Now, bear with me here. While stoned, if you really notice it, you feel timeless, very here in the moment. It's why the Hindus feel it is a gift from the god Shiva. It's a presence-inducing substance. Next time you get stoned, try to be more aware of this presence. Feel yourself being in the moment, realize that you are here. Realize that this presence is what all of life is and that there is nothing to be afraid of. You'll be surprised at how calm you can get just from that simple awareness. It works for me, although I can understand that some anxiety stems from deeper problems. This simple technique is useful mainly for the occasional anxiety sufferers. Try it out and see if it works for you. It's a bit spiritual, but I feel it holds fundamental truths.