My first tongue twister

It was the first one I ever heard.
I learned it the first time I was in a play,
The Velveteen Rabbit, it was called. 
The tongue twister went something like this:
"To sit in solem silence on a dull, dark, dock,
In a pestuantal prison, with a life long lock.
Awaiting the sensation of a short, sharp, shock,
with a chip and chippy chipper on a big black block."
Now you try.