Dreams...

[Dum-Dum]

Dreams have sometimes been speculated to be based on previous lifes, or, in a more believable sense, your current life but in a parallel universe as described in the Multiverse theory. I won't go too much into it as it will most likely go over the head of many an average joe but the basic principle is that for each choice we make in our lives a new universe is created where the opposite is true. So your dreams could be the alternative outcome of something based on a choice you made in life.

I understand a bit about that but only from owning every series of Red Dwarf on DVD box set