The term 2pi is derived from the thought of a circle and its degrees (or radians) being a meter for your state of highness. If you reach 360° (or 2pi radians), you have completed one circle and are now on your second circle, or stage, of being high. The limits from this point are unknown, but deeply personal and reflective.
As clarification, being >2pi cannot be described only as a good or bad experience. Your point on the circle should reflect your current environment or social setting. Obviously, going out with the family for a 4th of July picnic isn't going to be the best place to be 2 pi high, just like being at pi isn't the best for a lonely night home alone watching TV.