just how did puss cat get to london?

The following rhyme is inspired by true events!
It's a crazy place, but that's part of its charm. I love St. Elmo!
Thanks to MFB for starting me at the very ending.
Colloquial eloquence and wisdom are yours.

Open the door.
Walk the steps.
Make the decision to move
Through space and time.
It's a very fine line,
But you feel in your bones
What you need to do.
The decision seems hard.
It's an awfully big yard
Filled with dangers on left and right.
What needs to be done
You do all alone
When the neighbor kid slips outta sight.

You run 'cross the street
Pavement burning your feet.
You're stealthy and quick as a fox.
Not sure if you oughtta,
But sometimes you gotta
Just get the cat outta the mailbox.