Wasn't there an uncommanded MB ejection from a Harrier on some type of test flight, said aircraft then becoming the Lightning's only confirmed kill as it flew blissfully on while still pilotless.
I'm running on the fumes of aging memory here but as far as I recall that incident did not end well for the pilot.
I can barely imagine munching on your in-flight sandwich while gazing down at the instruments when suddenly you're doing 20g vertical with a dislocated head sitting in your lap. Scary things bang seats.