In science, a theory explains that parallel universes could exist, each with an exact copy of us all. But in each universe, we all do things slightly different. Here's an example: (Universe 1)
Wow, Butch. You really aced that spelling test! I'm very proud of you.
Awww :)
(Universe 2)
I can't believe you failed that spelling test, Butch. I hope you die a cold, lonely death.
Awww :(
(Universe 3)
... ro ,pihsralohcs a ,amolpid loohcs hgih a sa hcus ,stifeneb tnatropmi sah gnissaP ]1[.rekat tset eht rof secneuqesnoc tnatropmi htiw tset a si tset sekats-hgih A