Sam followed Justin home and continually kicked the back of Justin's legs. Justin had a flawless record of good behaviour but on this particular afternoon after being kicked yet again he turned and gave the obnoxious Sam a near perfect smack in the face.
Sam ran home screaming. He burst indoors and told his father he had been bullied. Dad knew exactly what action to take. Sam was bundled into the car and they set off to right the wrong. This didn't, as you might expect, involve a confrontation between them and Justin's family. No, the car screeched into the school car park and delivered the pair into the building.
I was playing sponge football with a group of children at after-school club, and had built up a healthy lead, when Sam and his dad burst in. Exploding from the father's mouth came a plethora of four-letter expletives, all referring to him being sick of nothing being done about his son being bullied.
Terrified children hid under tables and behind cupboard doors. Many were crying when the enraged parent moved towards me, pinned me against the wall and aimed a point blank headbutt straight at my nose.
Surprising even myself, I dodged the oncoming skull with remarkable deftness but unfortunately threw my own head back against a wall, which did his work for him.
As other staff arrived he rounded on them asking if they would like some too. Their body language indicated a clear desire to decline the offer.
Dad was arrested, charged and went to court. He escaped prison only because he had failed to connect with his headbutt. He was tagged and given a curfew. He also received community service.
Following newspaper reports his family left the area to start afresh somewhere else.
*Names have been changed.
The writer is a primary teacher. Send your worst parent stories to email@example.com and you could earn #163;50 in MS vouchers.