Strangers (on a train)

I regularly travel
on the Underground;
in the morning southbound,
in the evening, homebound.

Catch the first train
at Tufnell Park;
it is very  early
and still pitch-dark.

I use public transport
to get to my work
where I'm employed
as an accounts clerk.

Traditionally I enter
the last carriage
and I have done that
since my marriage.

I sit, people-watching
and what do I see?
Anonymous strangers
in front of me.

Immediately devising
a devilish plan,
I look around me
for a suitable man

One that, like me,
is capable and willing
to seriously contemplate
a reciprocal killing.

Now I ask myself
about what
made me imagine
that sinister plot.