[SeeSharp]

From Wiki:

There is controversy about calling Spice and K2 synthetic cannabis. Synthetic marijuana is a misnomer according to Lewis Nelson, MD, a medical toxicologist at the NYU School of Medicine. "It's really quite different, and the effects are much more unpredictable. It's dangerous, and there is no quality control in what you are getting."

[ConservingFreedom]

There is controversy about calling Spice and K2 synthetic cannabis. Synthetic marijuana is a misnomer according to Lewis Nelson, MD, a medical toxicologist at the NYU School of Medicine. "It's really quite different, and the effects are much more unpredictable.

Good find! Also of note: "how its effect compares to plain-old marijuana depends on other factors such as the relative amount in the product, how stable it is to combustion, how it’s metabolized in the body, among others." - http://scienceblogs.com/terrasig/2010/02/09/k2-spice-jwh018-marijuana/