PSYCHEDELICS
That's all I can really say. It all unfolds to you like an infinite multidimensional origami flower.
Be safe, know what you are taking, and be prepared to hold on for dear life. It will always pass.
A close, trusted friend is also good to have at hand or at a moment's notice.
Also, fractal screensavers and animations like 'Electric Sheep' are great for studying and integrating your experience after the fact.