"Extension" came up on the screen right after the clock hit zero.It was, I remember being slightly confused that I didn't hear the ref say "extension please", but the extension came up on the screen.
The question is, does it matter that the shot clock operation saw/heard him say extension if the ref didn't? Does it matter that he says extension if the ref doesn't hear it?
If a tree falls in the forest, and no one hears it, does it make a sound?