Woman stabbed by classmate in anger management class sues the company that ran the class

Here is an interesting story that would be funny if the result hadn't been that someone suffered real injuries as a result.  A certain organization held an anger management class during which one of the students got so angry she stabbed another one.  The student who was injured has sued the organization running the class.  What made the student so angry?  A video of "Dr. Phil."  The ABA Journal has more on the story.