It's a bit of Grand Guignol type humor....
INT. DAY- CELLAR LAB IN LONDON
The Doctor and her Assistant are working on creating a creature. It is hidden under a sheet. The Doctor is pacing around. She picks up a clipboard.
DOCTOR
Let's see...What's left?
ASSISTANT
(V.O.) He needs a foot.
She looks out the window at the feet and legs passing by. She puts down the clipboard and pushes a chair near the window. Picking up a pair of garden shears from the top of a cabinet near her, she leans out the window and lops the foot off a passing man. He hops for a bit, then falls over. Foot traffic continues uninterrupted. She gets off the stool and holds the foot aloft.
DOCTOR
What a great shoe! Christmas is coming up. Would you wear
anything like this?
ASSISTANT
Not my style.
DOCTOR
You can't wear trainers to everything, you know.
CUT TO:
The doctor and the assistant are finishing work on the foot. They uncover the other foot now, only to find they match!
DOCTOR
How could I make such a mistake? I've given him two left feet.
He'll never get on "Strictly Come Dancing," now. Oh, Woe!
ASSISTANT
Whoa!
DOCTOR
Woe, as in sorrow, pain.
ASSISTANT
I thought you meant, like, "Whoa!", check it out. Hold up! Look
at the freaky feet!
DOCTOR
You cretin. Why the hell would I say that?
ASSISTANT
Hey! Don't have go at me because you f**ked up the feet! Anyway,
having two left feet does not disqualify you from "Strictly Come
Dancing." They had that John Sergeant guy on.
The Doctor nods thoughtfully.
FADE OUT:
THE END