Scootrd:
I can relate to that. I used to dive on boats that included divers taking the advanced open water certification classes, which included a night dive. There were never any incidents for my dives like that, but people are more nervous at night and there have been quite a few cases of panic attacks. I spent a lot of time just being reassuring about how beautiful it is. Well, we did have some jellyfish blooms, but nobody got hurt.
I got a special view of a fortunately harmless incident one day while diving the kelp beds in Monterey Bay, California. There are lots of big seals in the area. I was at about 40 feet just checking out the kelp and another guy was at about 60 feet, about 40 feet away from me. He was checking out stuff near the bottom. One of the seals swam by me very close, and I never heard or sensed him, not even a bit of turbulence in the water. He dove straight for the other guy, who didn't see the seal coming. The seal apparently knew divers. He zipped right up to the other diver from behind, stuck his snout right up to the diver's mask and stopped abruptly.
I've never seen such a big cloud of bubbles from any diver. He was understandably startled tremendously. I was in a perfect position to see it all happen. I felt sorry for the guy and didn't think it was the least bit funny (safety first). But in hindsight it's a story I've repeated many times because it has so many interesting dimensions to it.
Since you like diving, read a book called The Last Of The Blue Water Hunters by Carlos Eyles. Awesome read.