Even if you solve the problem of where to go, I don't know how you ensure that location is clear of other stuff. If a bunch of air molecules suddenly appeared i

Even if you solve the problem of where to go, I don't know how you ensure that location is clear of other stuff. If a bunch of air molecules suddenly appeared inside you, I don't think you'd enjoy it. This might be why time travel in Terminator movies creates the sphere of energy right before the traveler appears: it clears out the space. But then why doesn't the person experience a moment of disruption being inside a perfect vacuum?