When someone says full bailout in a cave it has to include a zero viz exit in my opinion. It is one thing to test your sac rate in open passage but if someone is that concerned about it I would suggest adding lights out, or silt out to the scenario.
Bailout in fluffy, small cave without any viz but brown cloud would be good.
I learned a lot from a previous dive a few weeks ago in the mill pond. The tunnel became sidemount"ish" but I was literally feet from where it opened up. I nearly got to it. Coming back the line in zero viz I overlooked an area where the line passed over from one side of the small tunnel to the other side. The result was a complete wedging into the rocks. It took about 15 minutes to get out of the tunnel and once we got back on the main line the cave was blown for 500-700 ft of the mainline.
One might consider it a monumental silt out. One reason I enjoy a rebreather in that situation but would probably have been more successful in sidemount. :/
It was something to talk about when we got back to the house.
The highlight for me was getting back to the mainline and hearing/not seeing some of the other guys who were coming back from their dives and one says, "what .. the.. &@$%?!!"
It was perfect timing.
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