so you, like, totally walked out on your class? Did you say something like "I'm done, screw you guys, I'm going home," or did you just walk out? Your students have no right trying to degrade you for walking out on class -- yeah they might be paying for the class, but you have any and all right to give them a big fat F if they fail to even *try* in class.
I bet you can't wait to get your own place -- seriously, that's going to rock. :)