Ripley does similar Fiona. He has always had over exaggerated facial expressions from an early age. I think its connected to being on the spectrum. He is also very suddenly violent like that, Ive caught him with his little brother by the sides of the head banging his head on the window sill, he's punched me in the face, split his older brothers eyebrow open by belting him with a sippy cup............he even spits in my face when Im trying to talk to him if he isnt happy. Its quite hard to take at times because I know its not entirely his fault he is like that and I have zero idea how to get him to understand it isnt ok to do so.