Worst Case Wally saw a rat
On the street in front of his door.
He threw a stone, then realized
What the rat had come there for.
It had come to reconnoitre
Wally's house and then confide
To twenty thousand other rats
The ways to get inside.
Wally trembled with alarm.
His hands and feet were lead.
He knew he'd have a stroke and fall
And, when he did so, crack his head.
He could have called for help.
His next door neighbors were both kind.
But he knew that if he couldn't watch,
They'd come inside and rob him blind.
Thus, paralyzed, poor Wally stood,
Convinced he'd have to face
Not what what might or would occur
But the absolute worst case.