People of Reddit, who was your worst teacher, and why?

Reminds me of a primary school teacher I had, he was a sadistic old cunt who properly got in my friend's face and literally screamed at him until he cried for "smiling in class". You'd think from the way he was going on that this random ten year old had set fire to his house or something. This was in the Tony Blair era where primary schools had this "wake up shake up" thing where five minutes a day the whole school had to assemble on the playground and dance to improve fitness and he'd put people in detention if he felt their dancing wasn't enthusiastic enough. He also blatently favoured the girls, although I don't think he was actually a nonce (just a sad little man who felt the need to take out his frustration at his failures on random people's kids). He was just a complete waste of skin.

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