Where did you see or read that? I've searched the internet and cant find anything to substantiate that. Here is the scene in question - If he is one of the Marines walking in the background across the scene, you can't really tell. According to his wiki and imdb filmography he wouldn't be credited for a film for another 2 years.https://www.youtube.com/watch?v=-iUQSM14YsE
There must also be a flyable computer available for Nefarious to do FSO. So he doesn't keep talking about it for eight and a half hours on Friday night!
interview he did sometime in 2000s. he mentioned that scene and how he was now making 5 million a movie
I mean, I would have flown to England to be an extra in a Kubrick film too. But it seems like looking locally for talent might have been easier.
oh, this chap was an actor. I thought he was a singer.