I got to fly in the back seat once of an RA-5C Vigilante:
I loved it.
Certainly not as violent as the FA-18, but we did go supersonic for a while, and during one hi-G turn my vision narrowed down to two quarter-sized fields.
The navigator's cockpit was called a flying coffin - just two small foot-square windows. I was fortunate in that I was able to fire up the radar and nose mounted TV camera, the system I maintained on the aircraft.