I believe most ejection cable aircraft have a switch for changing between "eject both of us", and "eject just me". The actual ejection is set off by a rather la

I believe most ejection cable aircraft have a switch for changing between "eject both of us", and "eject just me". The actual ejection is set off by a rather large, difficult to use on accident, bar/lever. By default set to "eject just me". IIRC the sr-71 even had an indicator light showing if the other guy had ejected.