Cave divers, of course, deal with an elevated level of risk, and the most that I can say here is that we tend to conduct our work at the bottom of a deep cave on an extremely conservative basis with heavy levels of backup equipment and a policy to abort if any single person doesn't like the situation underwater at any time during the mission.

Many people think all I do is some random engineering work in between caving expeditions. It's been far more deliberate than that.

Caves are whimsical things, and geology on a local scale is random and unpredictable.

William Stone Quotes