You could have been paged notifying you that you were being given an op up.
--I had this happen in the ac at nrt.
I had this happen years ago on Qantas - business to F, LA to SYD. Sweet!
But I knew that this was very unlikely. I had checked the seats available and everthing was chock a block. Friday, June 26 was a big travel day it seems for families beginning the first cycle of vacation season.
But I like your optimism,
nrr!