Back in 1971, while under construction, a following long shot in the final scene of
The Hot Rock (1972) was filmed on the other side of the avenue. The scene included many non-casted background pedestrians, going about their business as Robert Redford (who plays a jewel thief) strides up the east side of Park Avenue.
Some of the pedestrians are looking up at something high overhead on the other side (apparently at the FNB building). One happens to mention something about it to Redford in passing.
Redford looks up a few seconds at whatever it is, somewhat amused, and moves on.
This last apparently-unscripted action is a bit of an unsolved mystery. What was Redford looking at? I think some kind of unusual high-up construcion operation was going on. But who knows?
