In this clip from Genius by Stephen Hawking witness the Many Worlds Theory in action with the help of lots of volunteers. With the help of many doppelgangers, the three volunteers look into Hugh Everett's Many Worlds Theory. When the signal is made everyone has to move. The choice is theirs and its totally random; but they only have finite options, either one step left or one step right. Watch the volunteers come to terms with the fact that the doppelgangers movements are not the same as their own. This is because the doppelgangers represent a parallel universe. In the Many Worlds Theory, every time you make a choice the universe splits into both possible outcomes. So everything that could happen does happen and each got there through their own free will.