That certain knack.

The foot in front has faltered,
The one behind has stumbled back.
Life spits out little triggers.
It has that certain knack,
Of giving your head reminders,
Of the things that soon could be.  
Your fears for the future,
Played out for you to see.
The foot in front has faltered,
The one behind did stumble,
But I must keep on pushing forward,
This is not the time to crumble.