They had some dude on "cops" wasted on bath salts he said he had just been walking aound for like thirty hours..and this dude was pumped to go another thirty..!
You can buy fake weed at gas stations/or you could in certain states..

I've never tried the the shit,,i prefer the stone of a heavy Sativa..
But they say the shit gets you wired up..
http://en.wikipedia.org/wiki/Synthetic_cannabis