hi my son suddenly gets scared looking at dslr cameras..recently at a birthday party he got scared while the camera person started clicking his pictures that he started crying a lot,since then he is afraid of cameras..he even gets scared sometimes looking at some people for the first time like oldman ,people with beard & grey hair..Earlier he wasnt like this, else he is a funloving jovial & a very naughty 15months old kid..but m so worried about these behaviours..is this normal?