I'm trapped behind a train track -
a new controller,  so I am, 
with no cap, flag or whistle - I'm denied a tram exam. 
There's an array of dials and switches - and I'm told just what to do:
'turn the left knob anticlockwise, then flip the top switch up on cue'.
The train lights blaze in red, as it emerges from the shed, 
'not too fast, at first though, or there'll be carnage up ahead!'
The figures on the hillside are mute as they just stare 
at the loco thundering past too fast, and don't even seem to care. 
I receive yet more instructions while that train...