Less than two minutes...?

[Kurben]

In many rather wellresearched timetraveller books you could go away, back- or forward in time, and stay there for months, even years and you would age these months/years but still return to the same time just a few minutes later than you left. The one thing you cant do is return to an earlier point than the one you jumped from because there cant be two versions of you in the same time. The theory is that if you do that you negate all his actions in that time which leads to the paradox that you wouldn't have jumped at all because that action, in the timeline you return to, has never happened. King does not go in too deep in timetraveller theory in his book.