I had a teacher who had definite anger management problems. He was my 5th grade math teacher, and I remember him getting so mad one day that he picked up a desk and threw it. But as far as I knew, he never laid a hand on any students. Apparently, his anger issues became such a concern in the following years that by the time my little brother (6 years younger than me) got to 5th grade, the teacher had been removed from his position. Since he never had hit a student, he was given a vice principal position in hopes that less direct contact with students would be okay. But I heard that he snapped one day and actually grabbed a kid by the throat.
Needless to say, he is no longer in that position either.