I've just read an article (found on the DM) that a 53 year old teacher has taken her own life before she was due to appear in court for accidentally catching a pupil's hair. This was whilst she tried to confiscate the girl's mobile phone.
A male teacher (also in the DM) faces being struck off for shouting 'Who the hell do you think you are?" At some pupils who filmed tik toks during his lesson, and slammed his hand on the desk.
Sometimes teachers lose their temper, especially if this behaviour is incessant. Who can blame them? This is why pupils' behaviour is so poor these days, because there are no consequences, and because of things like this.