Am I overreacting ?

So my son came home from school. (He’s in 3rd grade) He said his new lunch aid has been very mean to him. He said he was walking fast and she said to slow down. He said okay and slowed down. She then said “I’m training you bc you’re hyper”. The teacher is aware that my son has ADHD and is a little more on the “hyper side”. She said she let the lunch aid know. My son is In special ed. But don’t tell my kid you’re Training him as if he’s a dog. Am I overreacting?