I seem to recall an Aeroflot IL-62 reversing off stand at Heathrow once
It happened during some cold war diplomatic spat (not sure it was the Korean 747 incident) but was shown on TV. Have a vague recollection of people on board not being able to leave the aircraft (Soviet territory etc). The IL62 had not been refuelled and only just had enough fuel to get to AMS. The version I was told was that it departed without a flight plan and limited contact with ATC - always doubted that was wholly true. It had been parked on the old Terminal Two remote stands so it backed out straight onto a taxiway running parallel to 23/05.
Regularly experienced reverse out of gates on Northwest DC9 and 727's at MSP during the late 80's and early 90's.