A management professor at Texas A&M University is explaining why he failed every single student in his entire class.
Professor Irwin Horowitz says the massive flunk-fest came after he caught many of the students cheating.
He says the students told him to "chill out", "get out of my space", and "go back and teach" before yelling obscenities to his face.
So as punishment, he failed every last one in his class.
He wrote: "None of you, in my opinion, given the behavior in this class, deserve to pass or graduate as you do not in any way embody the honor that the university holds."
The 20 year professor says he's so disgusted that he's walking away from the course.
The University says they won't honor those Fs.