So there was one

First there were ten of them.
Then one went to pick up the dry cleaning.
So there were nine.
Another wanted to take a walk.
So there were eight.
The one who had gone for the dry cleaning came back, because Bells wasn’t very far from his house.
So there were nine.
They had a party with lots of friends showing up.
So there were 84.
The party finished, but a couple of their friends were idiots and couldn’t remember where they lived (and they were some of the ones that hadn’t been drinking).
So there were twelve.
One of them laid a bomb in the middle of the house and went across the road to use the detonator, blowing the house and all that was in it to pieces.
So there was one.

THE END