I know a paramedic who had to deal with a bath salts guy. No face eating or anything like that, but they needed a bunch of people to strap his ass down and give him an IV until it wore off. It's not like mushrooms or LSD where they pretty much know how to deal with it, how to talk down a bad trip, what meds can take off the trip, etc. That's the problem with all the crazy new drugs that keep coming out as they ban the old ones. There's no history of anyone taking them, so nobody has any clue on how to deal with people having bad trips.
Makes me wonder how long it'll be until they start selling datura as the next "pot replacement", and things'll get *really* weird...