> there and back is a five hour drive. During that drive, you could fall asleep and run off the road; have local fauna run out in front of your car; get head-on

> there and back is a five hour drive. During that drive, you could fall asleep and run off the road; have local fauna run out in front of your car; get head-on crashed by drunken drivers, and so on. > there are risks like tunnels collapsing and blocking the exit. But statistically, I'm sure that those are orders of magnitude less likely than having a heart attack, or falling over and breaking your neck. Unfortunately I believe you're making an error in how you interpret statistics. These risks exist in addition to the other risks of cave diving, not instead of. Your risk of heart attack or driving incident are already at a certain level. By cave diving you are adding risks such as tunnel collapse or disorientation underwater. While it's clear that you do plenty to mitigate those risks, they are not reduced to zero. So, all other things being equal, your risk of death is higher than others in your cohort. But I'm glad you clearly enjoy your hobby, and I fully respect you for that :)