[LeGrande]

Yep, the fact that simultaneity is relative leads to all kinds of unexpected consequences.

I think all of this is fun :)

[ETL]

A great illustration of the relative nature of simultaneity has a train moving past an assumed stationary observer on a platform alongside the train. At the center of the train car is a 2-way light beam emitter. To the person on the train the two light beams reach opposite ends of the car at precisely the same time. But to the observer on the platform watching the train go past left to right, the beam in the direction of the train's motion takes longer and longer to reach the front end of the train (because he sees it moving ahead of the advancing beam). While the beam directed in the opposite direct only approaches the halfway point between emitter and the rear end of the car. And once again, one effects progressively wins out over the other.

http://en.wikipedia.org/wiki/Relativity_of_simultaneity