More for Alex and Sean than anybody else...

"...just as the past causes the present, in some sense, and the present causes what happens in the future, so the different parallel universes are linked by being part of a common physical object. Physical reality is the set of all the universes evolving together, like a machine in which some cogwheels are connected to other cogwheels; you cannot move one without moving the others. So the parallel universes are connected as inextricably as the universes of past and future."
-Dr. David Deutsch, The Ghost in the Atom

This reminded me of a few books I read once...

You'd Better Watch Out....

Undead Stick Ninjas of the Night, oh yes.