My DS is 2.4 and is very easily scared by things on the television. It's nearly always children's programmes but occasionally adverts too.
Most of the time he just shouts no and brings us the remote to turn over but sometimes he will burst into tears and shake and scream until we turn over.
I spoke to a nursery nurse about it and she said it was strange behaviour and she had never heard of it before.
Does anyone else have any experience of this?