Twilli says aren't most caves cut off except to NACD members? Are you NACD? Twilli says panic and of course silting up a cave as well as improper equipment can have devastating results in a cave.
Twilli studied a case were some kids used a ski rope and (don't remember the cave) the rope floated up into a crack and became wedged and they silted and drown. Aren't most cave roped off now?
Twilli used to use a lot of air in some of those caves due to the high anxiety.