I took my two year old to an outside event and for part of it we sat down to watch something, when everyone clapped he went absolutely mad screaming flinging himself back really distressed and scared , the second time I put my hands over his ears and he didn’t cry ? There’s been another time we were on a train and he did the same thing at all the loud noises. He is also the same if you sing to him or show him any praise. Not sure if it just sounds like toddler traits ? His uncle has severe autism so obviously I’m on the look out for that I’ve read it can run in families, but I don’t think he could have as he has hit all his milestones speech is great and he can interact with other children? He does have an obsession with a day to day object and talks about it constantly but then I’ve read this is common in toddlers too? Just wondering if anyone has experienced this ?