If you've smoked spice for an extended time, and then stop you will have withdrawls.
Which include nausea, vomitting up chemicals(won't be able to even hold water down), sweating, loss of appitite, hot flashes & chills (at the same time), aggression, aggitation, feinding like an idiot. (Withdrawal like this is for someone who has smoked non stop for a few months.)
I've been through it, my boyfriend has been through it, and so have a bunch of our friends.
we've been off it since February of this year, and we aren't going back.