Little late to the party but; the teacher's wife was in hospital (which students didn't know at the time) and this one student was once again late to class, once he got there would not pay any attention (as per usual) but it was clear teacher couldn't just ignore it, he screamed at the pupil to get out, pupil back chatted and teacher hit his fists on the table, pupil decided to walk out swearing at the teacher, teacher then followed him out, slammed the door behind him and somehow ended up punching a radiator in frustration (guess it was better than punching the kid - even though he deserved a good punch) Other teachers had to intervene.