Slightly OT, I remember a few years ago a charter aircraft slewing off the runway at LGW and we had to operate using the shorter "Emergency" runway.
It was a nightmare explaining to passengers that the flights were operating with only half the seats (okay 2/3rds) in use because of the weight limitations, but if we hadn't, our BA operation at Gatwick would have come to a standstill!
It was sacrilege, too, to turn stand-by staff away when we knew there were seats available!