No, Peter. Johnny's onto something. I had the same eerie feeling yesterday evening.
Last night I finally found time to watch this DVD with my wife present...she's never seen it and I wanted her to. So I'd held off on the DVD till we had 2 hours free to watch it together. She enjoyed it thoroughly.
As the film ended, I was looking for the item Johnny speaks of, so I could point it out to my wife. It never appeared.
I very vividly remember it, but figured that my memory was faulty in the way Peter suggested of Johnny. I knew it wasn't Somewhere In Time
I was thinking of (though these two would be a good double-feature, eh?). But I just figured I misremembered the ending.
Now that I see Johnny talking about it, I know I wasn't crazy.
I just checked IMDB, but they don't have an "alternate version" listing for this film.
Nor does it appear on "The Cut List" at DVDFile.
I can't speak for Johnny, but I myself only first saw this film on Cable TV back in the 80's. Pan-and-Scan, of course...I loved seeing it in 2.35:1 finally! Perhaps the HBO/Showtime/MovieChannel version from 15-20 years ago had this difference.
As the credits finished and I never saw this item, I considered (silently; didn't want to make a fool of myself in front of the wife...I do enough of that!) the difference in the tone of the film without this "misremembered scene". I decided that it was a nice touch, but didn't make a difference. In fact, I recalled wondering all those years ago how their exploration of the area earlier in the film could miss it!
I expect that somewhere out there is a slightly different cut of the film. I wouldn't mind having closure on this mystery, and any other differences that might exist. But all in all the movie I watched last night was as enjoyable as ever. A real classic. And while I for once found myself upset that there weren't more supplements, I can live without 'em. The play's the thing!
PS - Peter, you might want to put a spoiler tag on that! What you say is general enough, but can still lead one to put two-and-two together.