Antidrug activists are concerned by the rising use of manmade drugs known as synthetic marijuana, which purport to be a legal way to a herbal high but are actually dangerous chemical concoctions that are banned in many states. 
The drugs, often sold in gas station and convenience stories under names like “K-2” and “Spice,” are known to cause bouts of paranoia and agitation, as well as psychosis. Some teens have coined the term “couch lock” to describe one effect – an inability to move despite being conscious. 



http://news.yahoo.com/synthetic-marijuana-rise-looks-pot-far-worse-224953961.html