Had a similar experience once; during PE I screwed up something, I think catching a ball or something, because I have dyspraxia so such tasks are extremely difficult. A teacher assumed I screwed up on purpose and was messing around, so they just began screaming at me, accusing me of being a trouble-maker and just really trying to make me feel like shit...all because I didn't catch a ball. I was like, 6 or 7. The same teacher was apparently somewhat infamous for screaming and over-reacting to kids because my sister had a similar story. As an adult, it's pretty obvious that teacher was horribly abusive and should not have been teaching.