I know I read this somewhere before, but I can't find anything to authenticate it, so you will just have to take my word for it.
When Rudy Van Gelder recorded, a red light came on to signal; time to wrap it up. On Joe Hendersons solo on "Idle Moments", he was sounding so good, that Rudy just let him blow past the allotted time, and didn't turn on the red light.
https://www.youtube.com/watch?v=JMiLAxMnoqE
Enjoy the music.

