It's a very strange, intense experience. It hits you very fast, ripping you out of your normal consciousness. There isn't really any time to freak out as you're deposited in what feels like another reality in just a few seconds. There are other beings there who you communicate with. Then, you're back. The residual effects last a few minutes, but the entire experience is about 15min from start to finish. A very strange experience, indeed. And not one that can be honestly compared to any other drug. It is unique.