I'm not sure how aggressive this dog really is, but this particular incident was much more "ridiculously out of control" than aggression. This Dane is over 2 years old and still not fixed, and they wonder why they are having troubles "all of a sudden"

DUH! I think she was actually coming into heat.
Throughout the classes the trainer never even greeted the dogs once, not one touch! I've been through classes with great trainers who aren't afraid to teach by doing, epecially when the owners are so completely clueless.
I sure hope I can find another class in my area.