I have had this dream about twice in the last month.
I living in a city with my family and there suddenly for no clear reason a killer dino alien robot that breathes fire that does not spread and he destroys everything. I seem to be the only one that survived and everyone seems to have evaporate.
The dream kind of reminded me of the recent remake of War of the World
both times i have woken up I have been scared.
I have had dreams about dinosaurs before and i always wake up scared, I guess I have a Dino phobia.