Dream of uncle, child, falling, roof

I was in bed, and I was woken up by the sound of my Uncle's dog barking (but I was in my own house), he was barking at me, then at the window in my bedroom that faces the garden. So, I get up and look outside, and in my dream instead of my house being right in the corner (end) of the street, there was a house to it's left and on the roof connecting the two, was a baby. A baby boy, I think, he was smiling one minute and the next he was falling off the roof. I then called for my mum and ran down the stairs and instead of running straight to the garden, I ran to the front of the house first and looked around. I not sure, what for ? Then I ran towards the garden and saw the baby laying face down dead in the garden. In the dream I knew the neighbour who's child that was, and watched as she was told what happened to her baby. The next thing I know, I'm awake in my bed crying.