That (real) incident was an indication of John's dry wit and sense of humor. He rarely told jokes, or talked much. But when he said something, the smallest thing, he often cracked everyone up.
No, I haven't seen the movie. I rarely go to movies, haven't seen a movie in a theater in probably 15 years. My wife and I prefer to wait for the tape/DVD and watch at home (you can skip vulgar parts, or turn it off if it turns out to be something you prefer not to see). Besides, the floors aren't sticky, there's not somebody's brat talking, the bathroom is closer, and you can have a cigar.
You can be sure we'll have the DVD when it is released. Some of John's (extended) family walked out on the family preview because they felt it portrayed John's first wife (Vivian) poorly.
Tuck