Chug, I guess we had egress drills on the Varsity too but l had more in mind the forward left, backward right etc as floor exercises supervised by PJI s.
Certainly egress training had its m ok moments. The only realistic one in a Nimrod involved classes climbing out the which IIRC was only practised before the aircraft went in the shed.
The Shack, OTOH, involved the full fig, harnesses, canopy, dinghy and usually buddy-buddy. I had to fight off one helpful soul who tried to fasten a dinghy to my chest. And then I tried unsuccessfully to PULL the beam window out. I flatly refused to try the upper hatch.