I've no clue how that would have happened, fate? Luck? Maybe the kind help of God or an angel (not sure why they'd give you a dream like that, but you never know!). Dreams like that are interesting though. Each time I hear about something like that I wonder even more about whether dreams really are just in our heads. Part of my mind doubts that we are, whilst part of my mind believes it's all in my head. Among the two distinct schools of thought, i'd say i'm in the middle, lol.
I had a dream a few days ago of it being really hot (I was at school, really feeling the heat of a summers day). In Australia right now it is Winter and has been cold for quite some time (rainy, that horrible kind of weather). But after that dream, the last few days have been quite warm and sunny. That kinda interested me, strange how things work? Maybe my body just noticed a slight change in temperature which was leading up to the sunny day? Or maybe a world somewhere else was preparing me for the slightly warmer weather?