Rob Ager cites an e-mail in his written analysis of 2001. The e-mail states that in the 90s the original film had been released in Hollywood theatres for a short time. In this release you'd see a simulated film reel skip on screen, exactly at that moment when the glass breaks on the ground in the alien zoo.
"Sometime in the 1990's they had released the original 70mm film in Hollywood for a short period of time and I and my girlfriend went to go see it. One thing happened in it that I wanted to share with you. At the moment the wine glass shatters near the end of the film, the film itself noticeably skipped, like the physical film reel was damaged. In the theatre I immediately laughed, because knowing Kubrick this was not a mistake. It goes beautifully with the interpretation that there are moments in the film where we are staring at nothing other than the actual monolith itself (the screen.) By having an error occur in the film on 2 levels at once, it's the film trying to step out of itself, a theme which is intimately tied in with the nature and mystery of consciousness, which I speculate that Kubrick was trying to express."
There seems to be no confirming information about this "skip" on the internet. Does anybody know something about that?