classic

It's not my place
To run the train
The whistle I can't blow
It's not my place
To say how far
The train's allowed to go

It's not my place
To shoot off steam
Nor even clang the bell
But let the train once
Jump the track,
Then see who catches hell.

- On the wall of the Stationmaster's Office, Grand Central Terminal (seen in Korea ~1965 at an especially appropriate moment) [first published tftd 88Nov4, though the poster remembers seeing it on office walls in the 1970s]