Steve, I couldn't agree more. In hind sight this was a risky thing for the DM to do. All he did was ask if anyone had a problem with going trough the tunnel. Those people could approach the wall by going over the top. This was only my 9th dive ever but I had already been to 100 fsw twice before in the cold dark waters of New England. Exploring a wreck no less with an insta-buddy that was gone by the time I got down the anchor line. Maybe times were different but when I got certified I didn't get any instruction on limiting my depth as a newbe. Just follow the dive tables. My standard issue dive tables even had decompression times listed. I never ventured beyond NDL limits. We were told to avoid that until we gained a little experience.Hmmmm. You are at 60 ft or so. Not used to depth. It gets dark and murky. In those conditions it could have been a dark nark coming on.
Ignorance is bliss. And I sure was having a good time!