I remember seeing Jurassic Park when it first came out. And I remember a scene describing a counter that kept track of the number of dinosaurs, so the operators could detect escapees. I remember the sense of doom when, in a later scene, they realized that it had been clamped to the expected count, and when unclamped, showed the true, larger number of dinosaurs (due to their breeding).
I've seen the film a few times since, and it has dawned on me that the scenes don't appear - verified it the other day, in fact. And searching the web, the sole reference is in this answer - which suggests the counter only appears in the novel.
I did read the novel once. Was this scene in any original version of the movie, or has my imagination painted in the gaps?