I would bet he probably shot it and forgot all about it.

Years ago, I was at these rehearsal sessions for the Halloween recording of Alien Voices with Leonard Nimoy and he was performing "The Cask of Amontillado". I commented to him that I hadn't heard him sound that sinister since Galvatron in Transformers the Movie.

He swore up and down he wasn't in it and never recorded any dialog for anything Transformers. I had to go out and buy a vhs of it (it was pre-dvd release) to show him his name on the cover and he was like "Wow, you don't say?"

After a while, he vaguely started to remember it and said he recorded the whole session for the film in like 2 hours and had never given it another thought.