Would have, should have, could have... our irreversible progression from the past through the present to the future continues, our lives devouring history like gull-wing cars using up gas. But when you absolutely, positively Gotta Get Back In Time, and your every move could change the world, well sometimes you need to get yourself up to eighty-eight miles an hour and get the hell outta there! A temporal shift is an event via which a person, or a person sitting in a DeLorean, is transported out of their timeline into another point within the space-time continuum. And this is its font.