The inspector decides to give Tom a pop quiz, asking, "What would
you do if you realized that two trains were heading towards each
other on the same track?"
Tom says, "I would switch one train to another track."
"What if the lever broke?" asks the inspector.
"I'd run down to the tracks and use the manual lever," answers Tom.
"What if that had been struck by lightning?" challenges the
"Then," Tom continues, "I'd run back up here and use the phone
to call the next signal box."
"What if the phone was busy?"
"In that case," Tom argues, "I'd run to the street level and use
the public phone near the station".
"What if that had been vandalized?"
"Oh, well," says Tom, "in that case I'd run into town and get
my Uncle Leo."
This puzzles the inspector, so he asks, "Why would you do that?"
"Because he's never seen a train crash."
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