Perhaps this somewhat gory bit is what you are thinking of:
"... * Gorshin did the best Peter Lorre impression in the business. As a matter of fact, to this day I can do a version of Gorshin’s Lorre in a bit he wrote called “The Man With The Soft-Boiled Eyeballs:”
I remember when I was very young, I went to my father and said, “Could I have a new toy?”
“Why do you want a new toy?” he asked me.
“I want a new toy because every other kid on the block has a new toy!!”
And then he said something that was the wisest thing he ever said to me. “Son,” he said, “I want you to always remember… the greatest toy you will ever have is your brain.”
So I went away feeling very confused… But later that night I figured out what he was talking about and took an axe and cut off the top of his head and started playing with my new toy…
Tomorrow they’re going to teach me to make baskets.
His final performance is being broadcast tonight on CBS: Quentin Tarentino cast him in the season finale of CSI: Crime Scene Investigation.
We’ll miss ya, Frank...."
Someone else recalls this.
"...Wow! Frank Gorshin in G & S, I seem to remember him doing a very creepy Peter Lorre impression...."
"But Rick, hide me. You must help me, Rick..."