I watched it last night, tried to pay attention the details. Didn't have a chance to watch it over again. Did he jump in into the past twice? Or past, then future? At first, I thought he simply existed in an alternate universe different from what we know as reality. But then I thought maybe something happened where the monkeys change time to take over earth. Also explain about his ship, the amount of time it was there, and everyone that came after him.