After boarding a train, I always fret
if it's the one I'm supposed to get,
And at home at night, I frequently fear
the presence of a burglar near,
And when at work, I sometimes pale
at thoughts my efforts just might fail,
And when treating friends to lunch, I cannot hide
concerns that my credit card might be denied.
But the greatest fear I ever face
is the one that makes my pulse rate race -
It's the one that will not cease or desist
and that's what will be left for me to worry
    about when i've run out of things to worry
    about on my increasingly lengthy worry
    list...