When I was flying home for Thanksgiving, there was bad weather in Houston. "Bad weather in Houston" meant, I learned, "there may be too many people booked on this flight" due to a weight balancing issue.
I volunteered to take a later flight (for a $250 voucher). I would have arrived in San Antonio only 3 hours after my originally scheduled arrival!
Alas, my seat was not needed. In fact, it appears they didn't need to boot anyone off the flight. You could say that I was unlucky because I missed out on an opportunity for a $250 voucher. Or that I'm lucky because I arrived in San Antonio with no delay.
Perspective shows her worth once again.