There is a train signal-man up in the Highlands. He really wants to get a promotion so he sends a letter to British rail and they send up an assessor.
He asks him what he would do if two trains were barrelling down a track at each other.
The signalman says he would out one train on a passing loop.
"but what if the points are jammed?"
"I would throw the emergency switch"
"but what if the switch is on fire?"
"I would run out and use the lever on the line to switch the train into the passing loop"
"but what if it was struck by lightning?"
"then I'd get my uncle Alistair"
"why?"
"he's never seen a train crash before"


