Umm
RAF F-4 in Germany, 70's I think where the back seater ejected first and the pilot then was unable to eject because "sucK' prevented the canopy thrusters from shoving the canopy clear, hence the front seaters seat was inhibited by the canopy interlock. As far As as I recall it he got the seat to fire eventually...no doubt someone will fill in the gaps or correct the story. Seem to remember this resulted in improved canopy "thrusters"
and also the recommendation for the front seater to eject first ( are you there Nick?...Nick?... Nick..
)
Wasn't there also a Lightning incident around the same time, where a mid-air collision resulted in a failed ejection due jammed canopy? The pilot managed to land the thing.
All from memory, all probably wrong!!! Must rush - off to argue about heroic things such as locked flight deck doors elsewhere
