Picture this. You are sitting on the station on a train nestling your coffee, sandwich and newspaper.
That train moves off, briefly making one think one's train is moving backwards when it is not. Or - more often still - the other train is arriving so one thinks one's train is leaving already.
I know there is a German word for this, but is there an English word or phrase that succinctly describes this (neither special nor general) relativistic effect?