[stilldavid]

I'm a longtime rock climber and climbed a tower professionally back in another life. With most things, it's practice with the gear that builds trust in your system. I can do most anything at a height these days because I know that I'm safe; it lets me push that lizard brain feeling away. I similarly experienced this learning to SCUBA dive a few years ago - it's horrifying! But the more time spent doing the thing, practicing the systems, failure modes, etc... let me relax and enjoy the fish rather than freaking out that I'm 70' underwater.

[WalterBright]

I tried scuba diving. At 30 feet underwater, I felt a constant bubbling panic that took a great deal of effort to push back on. I suppose I would eventually get accustomed to it, but that was the first and last scuba dive for me.