A Jimmy memory, kind of odd, but stuck with me.
Went to the NY Giants game at Texas Stadium in 1989. Cowboys were winless, and Giants put them away in the 3rd qtr. (final was 30-14 or so); I always stay and watch the players, coaches handshakes, greet, etc. Jimmy and Bill Parcells met at midfield, had an animated, friendly chat for several minutes. (Parcells talked, mostly, some smiling, laughing). It wasn't one of those fly-by, quick handshakes. Later, they both waved to each other before jogging off the field.
I figured they knew each other fairly well. I never forgot that.