Getting a new student on Tuesday

Great.  Just when I thought it was going to be a really good year, I find out that I will be getting a new student.  And not just any student.  Apparently, this kid is returning from jail or juvie or alternative school.  They didn't tell me which.   Basically, all they said was "if he screws up just one tiny bit, send him out and we'll get rid of him".  Lovely.  Now, I'm wondering if he is violent, or high strung, or drugged out or just scary to look at.  Will assigning homework send him into a rage?  I hate when no one will tell you about a student.  I've really got to start taking some form of martial arts classes!  This is one of those situations where you actually hope he's a stoner or something.  I'd prefer him to sleep through class than to freak out and shoot everyone!  Oh well, guess I'll find out on Tuesday.  Thank goodness we have tomorrow off!