E=MC2
The Sydney Commuter explains the physics of CityRail: remember, time is relative, so when the display says the next departing train is due in 2 minutes, what they're really saying is: E(lectronic indicator) = M(aybe) C(oming) [in] 2 [minutes]. Never more true than when you're depending on catching a particular train. I figure that CityRail operations are also the proof of string theory, because they operate on a [shoe]string. I crack myself up.