Hi, I was wondering, in the einstein train example, the observer who is on the ground and not moving sees both lightning bolts strike the train at the same time, while the observer who is on the train sees one bolt strike before the other. However, if there is another observer on the ground who is NOT standing right in between the two lightning strikes, what would he see? Would he see the two lightning strikes as being simultaneous? Does what is simultaneous depend on where you are standing? Or only depend on whether you are moving?