Had this in the back of my mind for a while and finally decided to try and replicate it
While I didn't completely succeed I was able to recreate the immortality on yer back aspect
I took morphine and walked into the tile that automatically creates the DC save
Had a hard time with the timing as I had to walk into it as soon as the after effect of the morphine kicked in to assure the save was created after my character had croaked
Reloaded and had about 2 seconds of free will before the game would crash
In those free 2 seconds I ran back to the elevator and the game seems stable unless of course you leave
Upon leaving the room I think the "game over" flag raises but no menu selection appears resulting with the screen slightly dimming and being left with no option but to reload
The save for those interested
https://www.dropbox.com/sh/ds6krqe1xb9l0aq/AABQ7aHSaJ6utxmPaLV_IF1_a?dl=0For some reason cheating death immensely damaged the durability of all my gear
Even the unequipped stuff - weird
Wish the puddle of blood pooled up everywhere ya went
I'll keep tinkering but for now this is my initial success