True, but under our current understanding of QM, it is literally impossible for you to interact with parallel worlds. Someone 'outside' the universe may observe

True, but under our current understanding of QM, it is literally impossible for you to interact with parallel worlds. Someone 'outside' the universe may observe[0] that we are in a superposition, but it is theoraticly impossible for our state to be influenced by any of the other states. [0] Under a loose definition of observe.